Algebra 2 Homework II

[Rip the Jacker]

Directions: Find the roots of each polynomial equation

9. x^3 -5x^2 +2x +8 . I graphed this and got: -1, 2, 4
10. x^3 +x^2 -17x +15 . I graphed this and got -5, 1, 3
11. 2x^3 + 13x^2 +17x -12. I graphed this and I got -4, -3, and what looks to be .3, but I'm not 100% sure and I tried looking at 2nd, table (ti-83)

Am I doing this right?

 

[Rip the Jacker]

?

 

[InlineFour]

use your "zeros" button.

 

[JoeFahey]

42

 

[spunkz]

Originally posted by: Rip the Jacker
Directions: Find the roots of each polynomial equation

9. x^3 -5x^2 +2x +8 . I graphed this and got: -1, 2, 4
10. x^3 +x^2 -17x +15 . I graphed this and got -5, 1, 3
11. 2x^3 + 13x^2 +17x -12. I graphed this and I got -4, -3, and what looks to be .3, but I'm not 100% sure and I tried looking at 2nd, table (ti-83)

Am I doing this right?

plug the numbers back in the equation for x. if you get 0, you're good

 

[Rip the Jacker]

Originally posted by: InlineFour
use your "zeros" button.

Wtf do I do for Left and Right Bound? I get an error...

 

[Goosemaster]

synthetic division. I thought I told you that last time:|

 

[OdiN]

The answer is 42. But do it yourself.

 

[wobbuffet]

Originally posted by: Goosemaster
synthetic division. I thought I told you that last time:|

LMAO :gift::laugh:

 

[Wheatmaster]

man wtf, i understand calculus or some ap science question, but this is getting ridiculous.

 

[Goosemaster]

Originally posted by: wobbuffet

Originally posted by: Goosemaster
synthetic division. I thought I told you that last time:|

LMAO :gift::laugh:

damn lazy punks don't realize that progressive learning means that you don't forget what people teach you as your classes REQUIRE you to retain that info for future use,

 

[Goosemaster]

And RIP the Jacker..I don't mean to be mean....it's just that we already told you how to do this...

Why not try harder and save bandwidth so neffers like me can neff that much more?


*promply removes his foot from its present postion lodged up RIP the Jackers ass*

 

[lrad50]

3 fiddy.

 

[Rip the Jacker]

Originally posted by: Goosemaster
And RIP the Jacker..I don't mean to be mean....it's just that we already told you how to do this...

Why not try harder and save bandwidth so neffers like me can neff that much more?


*promply removes his foot from its present postion lodged up RIP the Jackers ass*

The directions were different this time, and my teacher told me to use a graphing calculator instead of manually solving... Didn't know you can just use the same method as last time.

Last time, it gave you x-1, x-2, and told you to use synthetic division. These directions ARE different.

 

[Elderly Newt]

Originally posted by: Rip the Jacker

Originally posted by: InlineFour
use your "zeros" button.

Wtf do I do for Left and Right Bound? I get an error...

Assuming you're using a Texas Instruments Graphing Calculator:

I assume you're getting a "NO SIGN CHANGE ERROR"? This is caused by having your left and right bound either both above the x axis or both below the x axis when finding a zero (x-intercept). The left and right bound tells the calculator the interval in which to look for a zero. Logically, if the inverval is completely below or completely above the X-axis, it will not contain a zero.

When it asks for LEFT bound, simply pick a point on the graph that is to the LEFT of the zero. Select the point and hit enter. When it asks for RIGHT bound, pick a point on the graph that is to the RIGHT of the zero. Select the point and hit enter. It will now say "guess?" Hit enter. It will now calculate and display the value of the zero. Do this as many times as you need until you've gotten all the zeros.

 

[Goosemaster]

Originally posted by: Rip the Jacker

Originally posted by: Goosemaster
And RIP the Jacker..I don't mean to be mean....it's just that we already told you how to do this...

Why not try harder and save bandwidth so neffers like me can neff that much more?


*promply removes his foot from its present postion lodged up RIP the Jackers ass*

The directions were different this time, and my teacher told me to use a graphing calculator instead of manually solving... Didn't know you can just use the same method as last time.

Last time, it gave you x-1, x-2, and told you to use synthetic division. These directions ARE different.

1) you should have posted the details so we wouldn't chew you out

2) perhaps the directiosn ARE different, but you DID NOT POST THEM, you you DESERVE what you got

 

[Rip the Jacker]

Originally posted by: Goosemaster

Originally posted by: Rip the Jacker

Originally posted by: Goosemaster
And RIP the Jacker..I don't mean to be mean....it's just that we already told you how to do this...

Why not try harder and save bandwidth so neffers like me can neff that much more?


*promply removes his foot from its present postion lodged up RIP the Jackers ass*

The directions were different this time, and my teacher told me to use a graphing calculator instead of manually solving... Didn't know you can just use the same method as last time.

Last time, it gave you x-1, x-2, and told you to use synthetic division. These directions ARE different.

1) you should have posted the details so we wouldn't chew you out

2) perhaps the directiosn ARE different, but you DID NOT POST THEM, you you DESERVE what you got

Um. They are the first thing in bold?


Directions: Find the roots of each polynomial equation

 

[Elderly Newt]

Originally posted by: Rip the Jacker

Originally posted by: Goosemaster

Originally posted by: Rip the Jacker

Originally posted by: Goosemaster
And RIP the Jacker..I don't mean to be mean....it's just that we already told you how to do this...

Why not try harder and save bandwidth so neffers like me can neff that much more?


*promply removes his foot from its present postion lodged up RIP the Jackers ass*

The directions were different this time, and my teacher told me to use a graphing calculator instead of manually solving... Didn't know you can just use the same method as last time.

Last time, it gave you x-1, x-2, and told you to use synthetic division. These directions ARE different.

1) you should have posted the details so we wouldn't chew you out

2) perhaps the directiosn ARE different, but you DID NOT POST THEM, you you DESERVE what you got

Um. They are the first thing in bold?


Directions: Find the roots of each polynomial equation

He's talking about the fact that you now have to use a graphing calculator instead of manually solving.

 

[TuxDave]

What's the point of doing homework if all it's testing you on is how to use your calculator?

 

[Fenixgoon]

Originally posted by: Goosemaster

Originally posted by: wobbuffet

Originally posted by: Goosemaster
synthetic division. I thought I told you that last time:|

LMAO :gift::laugh:

damn lazy punks don't realize that progressive learning means that you don't forget what people teach you as your classes REQUIRE you to retain that info for future use,

meh, i forgot synthetic division, and i havent used it since.. currently doing taylor/mclauren series polynomials in calc2/intro to diff eq

 

[bootymac]

.

 

[Goosemaster]

Originally posted by: Elderly Newt

Originally posted by: Rip the Jacker

Originally posted by: Goosemaster

Originally posted by: Rip the Jacker

Originally posted by: Goosemaster
And RIP the Jacker..I don't mean to be mean....it's just that we already told you how to do this...

Why not try harder and save bandwidth so neffers like me can neff that much more?


*promply removes his foot from its present postion lodged up RIP the Jackers ass*

The directions were different this time, and my teacher told me to use a graphing calculator instead of manually solving... Didn't know you can just use the same method as last time.

Last time, it gave you x-1, x-2, and told you to use synthetic division. These directions ARE different.

1) you should have posted the details so we wouldn't chew you out

2) perhaps the directiosn ARE different, but you DID NOT POST THEM, you you DESERVE what you got

Um. They are the first thing in bold?


Directions: Find the roots of each polynomial equation

He's talking about the fact that you now have to use a graphing calculator instead of manually solving.

exactly.

 

[Elderly Newt]

Originally posted by: TuxDave
What's the point of doing homework if all it's testing you on is how to use your calculator?

A graphing calculator is a very powerful tool, and knowing how to use it properly and efficiently is essential. Although, you're right: it's pretty pointless if you don't understand the concept you're using it for.

 

[JustAnAverageGuy]

2x^3 + 13x^2 +17x -12. looks closer to .5 to me

-4......2.....13.....17.....-12
..................-8.....-20.....12
-3......2.......5......-3.........0
..................-6......3
.........2......-1.......0

2x-1 = 0

Solve for x

 

[JustAnAverageGuy]

*double post*