Question

dada a função f(x) = -2x - 5, calcule 2. f (0) - 3. f (-3) + f(-2)

Answer 1

$\mathsf{f(x)=-2x-5}\\\\\\ \mathsf{f(0)=-2\cdot0-5}\\\\ \mathsf{f(0)=0-5}\\\\ \mathsf{f(0)=-5}\\\\\\ \mathsf{f(-3)=-2\cdot(-3)-5}\\\\ \mathsf{f(-3)=6-5}\\\\ \mathsf{f(-3)=1}\\\\\\ \mathsf{f(-2)=-2\cdot(-2)-5}\\\\ \mathsf{f(-2)=4-5}\\\\ \mathsf{f(-2)=-1}$


$\mathsf{2\cdot f(0)-3\cdot f(-3)+f(-2)}\\\\ \mathsf{2\cdot(-5)}-3\cdot1+(-1)\\\\ \mathsf{-10-3-1}\\\\ \mathsf{-13-1}\\\\ \boxed{\mathsf{-14}}$