Respostas

2014-03-06T02:11:54-03:00
F(x)=2 x^{2} +5x-15

f(3)=2×9+5×3-15 ⇒ f(3)=18+15-15 ⇒ f(3)=18
f(2)=2×4+5×2-15 ⇒f(2)=8+10-15    ⇒ f(2)=3

f(3)-f(2)=15