SOLUTION: if f(x)= (6x^2)-4, what is the answer when f(-8x)?

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Question 836224: if f(x)= (6x^2)-4, what is the answer when f(-8x)?
Answer by LinnW(1048) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)= (6x^2)-4, what is the answer when f(-8x)?
substitute (-8x) for x in (6x^2)-4
f%28x%29+=+%286%28-8x%29%5E2%29-4
now simplify
f%28x%29+=%28+6%2864x%5E2%29+-+4%29
f%28x%29+=+384x%5E2+-+4