Why can't I get this? math help

[RESmonkey]

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Part B of the first problem. I got it down to Y^2 - Y = 6. But how am I supposed to find Y? It's like, algebra raping.

 

[imported_LoKe]

3^2 - 3 = 6?

 

[dighn]

you have a quadratic equation. factor it or apply the quardatic formula

 

[rocadelpunk]

subtract the 6 and you have many options to solve a quadratic

1.) factoring
2.) quadratic formula
3.) calculator

etc

no offense, but what are you doing in a calculus/ap course if you don't know how to solve a quadratic?

edit: I suppose bonehead stuff happens to the best of us : P

 

[Epic Fail]

Y^2 - Y = 6

Y^2 - Y - 6 = 0

(Y-3)(Y+2) = 0..........

 

[RESmonkey]

LOL totally forgot...I'm an idiot.

I'll do the quadratic...since it's a non-calc thing.

 

[gsethi]

Originally posted by: RESmonkey
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Part B of the first problem. I got it down to Y^2 - Y = 6. But how am I supposed to find Y? It's like, algebra raping.

You cant be serious...

Y^2 - Y = 6
=> Y^2 - Y - 6 = 0
=> (Y - 3) (Y + 2) = 0
=> Y = 3 OR Y = -2

Check Answers:
Y = 3:
3^2 - 3 = 9 - 3 = 6 Ok.

Y = -2:
-2^2 - -2 = 4 + 2 = 6 Ok.

You fail at Algebra if you cant solve that equation

 

[RESmonkey]

haha...I epically failed at algebra.

 

[RESmonkey]

...I only got 1 x value for Part C, and that's 0.

Anyone get anything different for Part C?