Question

dada a função f(x)=2x-5x+4 obs: o 2x é ao quadrado

determine
f (0)
f(3)
f(-2)
f(1/2)

Answer 1

f(0)= 2×0²= 0 - 5. (0) = 0+4= 4
f(3)= 2×3²= 18-15= 3+4 = 7
f(-2)= 2×(-2²)= 8 - (-10) = -18
f(1/2)= 2×1/4= 2/4 - 5/2= -3/2

Answer 2

F(0)= 2.0^2-5.0+4
F(0)= 4

F(3)= 2.3^2-5.3+4
F(3)= 2.9-15+4
F(3)= 18-11
F(3)= 7

F(-2)= 2.(-2)^2-5.(-2)+4
F(-2)= 2.4+10+4
F(-2)=8+14
F(-2)= 22

F(1/2)= 2.(1/2)^2-5.(1/2)+4
F(1/2)= 2.(1/4)-5/2+4
F(1/2)=2/4-10/4+16/4
F(1/2)=2-10+16
F(1/2)=8