Question

Suatu Fungsi ditentukan dengan rumus f(x) = x² + 2X - 3 hitunglah;

A.f(2)
B.f(-2)
C.f(-5)

Answer 1

F(2) = 2^2 + 2(2) - 3 = 4 + 4 - 3 = 5
f(-2) = -2^2 + 2(-2) - 3 = 4 - 4 - 3 = -3
f(-5) = -5^2 + 2(-5) - 3 = 25 - 10 - 3 = 12

Answer 2

A. f(2) = 4 + 4 - 3 = 5
B. f(-2) = 4 - 4 - 3= -3
c. f(-5) = 25 - 10 - 3 = 12