Asked by Yania

a function f(x) is defined as f(x)= -8x^2. What is f(-3)?
Answered by Leo
All you need to do is substitute -3 in place of the x.
Answered by Ollie
substitute -3 for every x in f(x) and simplify.
Answered by Steve
by now you've probably done it, but watch the "-" signs carefully

f(-3) = -8 * (-3)^2 = -8(9) = -72
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