SOLUTION: Given F(x)= 2x squared-8x+9, find all values of x for which f(x)=9 How do I solve this??

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Question 387920: Given F(x)= 2x squared-8x+9, find all values of x for which f(x)=9
How do I solve this??
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
9 = 2x^2 - 8x + 9

0 = x^2 - 4x

0 = x(x - 4)

x = 0

x - 4 = 0 ___ x = 4