Question

Okay, I'm doing problems on Non-Linear Systems of Equations and COMPLETELY LOST! Help?

y=x^2+10x+11
y=x^2+x-7

Answer 1

x^2+10x+11=x^2+x-7
10x+11=x-7
9x=-18
x=-2

Answer 2

I don't think that's right, what happen to the x^2?

Answer 3

A plot generated by Mathematica 8 is attached. Observe the x coordinate where the curves cross each other.

Answer 4

Okay, so the x coordinate of the answer is negative two?

Answer 5

Yes.