Homework Help: algebra

Posted by confused on Thursday, May 24, 2007 at 10:34pm.

Given f(x) = 5x2 – 3x + 1, find f(–2).
so would this be 5(-2*-2) -3(-2)+1
answer being 15

not correct
(I assume looking at your substitution that the first term is 5x^2 or 5x²)

f(x) = 5x^2 – 3x + 1
f(-2) = 5(-2)^2 - 3(-2) + 1
=5(4) + 6 + 1
=27

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