Question

Seja a função f(x) = x2 + 2x -3, determine o f(x) para:
a) f(x) = 1
b) f(x) = 3
c) f(x) = -2

Answer 1

a)f(1)=2.1+2.1-3

f(1)=2+2-3

f(1)=1

b)f(3)=2.3+2.3-3

f(3)=6+6-3

f(3)=9

f(-2)=2.(-2)+2.(-2)-3

f(-2)=(-4)+(-4)-3

f(-2)= -8-3

f(-2)= -11