Question 478804
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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