Question

calcule as funções f(x)=x ao quadrado-2x-3

a)f(0)
b)f(-1)

Answer 1

f(x)=x^2-2x-3

a)f(0) x=0

f(0)=0^2-2.0-3
f(0)=0-0-3
f(0) = -3

b)f(-1) x=-1

f(-1)=(-1^2)-(2.-1)-3
f(-1)=1-(-2)-3
f(-1)=1+2-3
f(-1) = 0