Question

if f(x)=5x^2-3x+7, find f(2)-f(-2)

Answer 1

Answer:

f(x)=5x^2-3x+7 (Given)

f(2)=5×(2)^2-3×2+7

=5×4-6+7

=20-6+7

=21

f(-2)=5×(-2)^2-3×(-2)+7

=5×4+6+7

=20+6+7

=33

Now, f(2)–f(-2)

=21-33

=-12