Need help with factoring.

[UnoSigmaPi]

Factoring has never been my strong suit. I was wondering if someone would be kind of enough to help me. Thanks in advance.

(y^3+27)

 

[marcello]

What chapter of Sigma Pi are you from? I'm from ZH at Santa Clara U.

I'll work on it for a bit and post back if no one has

 

[UnoSigmaPi]

Zeta Omicron, thanks

 

[marcello]

Ok, this is what I got:

(y^3 +27)=(y+3)*(y^2-3y+9)

Don't know if that helps at all, but you can find all the roots now easily. Is that what you're trying to find?

 

[UnoSigmaPi]

i know the anwser, but i'm not sure what steps to take.

 

[D3m0nHunt3r]

Originally posted by: UnoSigmaPi
Factoring has never been my strong suit. I was wondering if someone would be kind of enough to help me. Thanks in advance.

(y^3+27)

Well first you gotta slap some kevlar and metal plates on that Factoring suit of yours and then go into battle.

 

[UnoSigmaPi]

i've already done that

 

[Syringer]

Factor out y+3, then use either long or synthetic division to get the coefficients of its multiple..

That is, find out what (y^3+27)/(y+3) is.

 

[kermalou]

Originally posted by: marcello
What chapter of Sigma Pi are you from? I'm from ZH at Santa Clara U.

I'll work on it for a bit and post back if no one has

this post is worthless without pics
:camera:

 

[The Stigenator]

Originally posted by: UnoSigmaPi
Factoring has never been my strong suit. I was wondering if someone would be kind of enough to help me. Thanks in advance.

(y^3+27)

first rule of factoring.. learn the formula's... there are only a few. Then apply the formula

(a+b)^2 = a^2 + 2ab + b^2
its associated one is : (a-b)^2 = a^2 - 2ab + b^2

(a^2 - b^2) = (a+b)(a-b) [a^2 + b^2 does not exist]

(a+b)^3 = a^3 + 3a^2b + 3ab^2 + b^3

(a-b)^3 = a^3 - 3a^2b + 3ab^2 - b^3 (check this one im kinda confused)

(a^3 + b^3) = (a+b) (a^2 - ab +b^2) (double check this one - I am sleepy but this is the one you need).

(a^3 - b^3) = (a-b) (a^2 + ab +b^2) (double check this one too - I am sleepy but this is the same formula as above for the negative.).

 

[TuxDave]

At some point.. you just realize that this is a sum of cubes and you can get the factorization via formula.

 

[UnoSigmaPi]

thanks a bunch

 

[marcello]

Originally posted by: kermalou

Originally posted by: marcello
What chapter of Sigma Pi are you from? I'm from ZH at Santa Clara U.

I'll work on it for a bit and post back if no one has

this post is worthless without pics
:camera:

Now that's funny, I don't care who you are, that's funny.