Question

Diketahui f(x)=8x+4 dan g(x)=2x-4 tentukan:
a.(f+g)(x)
b.(f-g)(x)
c.(fxg)(x)

Answer 1

A. (f+g) (x)
fx + gx = 8x+4 + 2x-4 = 8x + 2x -4 +4 = 10x

b. (f-g) (x)
fx - gx = 8x+4 - 2x-4 = 8x - 2x +4 -4 = 6x

c. (fxg) (x)
fx x gx = (8x+4) (8x-4) = 64x^2 -32x +32x -16
=64x^2 - 16