SOLUTION: Consider f(x)=x^2+99x+18. find the value of x so that f(2x)=2f(x).

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Question 478804: Consider f(x)=x^2+99x+18. find the value of x so that f(2x)=2f(x).
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

finding the value of x so that f(2x)=2f(x).

f(x)=x^2+99x+18

    (2x)^2 + 99(2x) + 18 = 2x^2 + 198x + 36

     4x^2 + 198x + 18 = 2x^2 + 198x + 36

             2x^2  - 18 = 0

             x^2 = 9

             x = ± 3