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OpenStudy (anonymous):
simplifiy f(x)=x^2-1 if f(2x)
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OpenStudy (anonymous):
f(x) = x^2 - 1 if f(2x) all you gotta do basically is plug in 2x for x f(2x) = (2x)^2 - 1 f(2x) = 4x^2 - 1
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