Question

Funçao: f(x)2x-5.-7+2
De:
f(2)
f(-5)

Answer 1

f(x)=2x-5.-7+2
Só substituir:   

f(2)=4-5.-7+2
f(2)=4+35+2
f(2)=41

f(-5)=-10-5.-7+2
f(-5)=-10+35+2
f(-5)=27