SOLUTION: what is the maxium y value for f(x)=x^2+6x+8

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Question 637522: what is the maxium y value for f(x)=x^2+6x+8
Answer by aquyu214(10) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=x^2+2*3*x+3^2-3^2+8
=x^2+2*3*x+3^2-1
=(X+3）^2-1
when X=-3 get the minimum value -1
X changed then Y can be infinite, there is no maximum y value