Question

Dada a função f(x)=4x²+5x-y
Determine :
A) f(2)
B) f(-3)
C) f(0)

Answer 1

a) f(2)
f(2)= 4.(2)²+5.(2)-y
f(2)= 4.4+10-y
f(2)= 16+10-y
f(2)= 26-y

b) f(-3)
f(-3)= 4.(-3)²+5.(-3)-y
f(-3)= 4.9-15-y
f(-3)= 36-15-y
f(-3)= 21-y

c) f(0)
f(0)= 4.(0)²+5.(0)-y
f(0)= 4.0+5.0-y
f(0)= -y