F(X) = 3X²+2
G(X)= -4X-3
Ditanya :
1) (f+g)(x)……?
2) (f-g)(x)……?
3) (2f-3g)(x)……?
Diketahui :
1. (f+g) (x)= f(x) + g(x)
=( 3x^2 +2 ) + (-4x-3)
=3x^2 -4x-1
2. (f-g) (x) = f(x) – g(x)
= ( 3x^2 +2 ) – (-4x-3)
= 3x^2 + 4x +5
3 (2f-3g) (x) = 2f(x) -3g(x)
= 2 ( 3x^2 +2 ) – 3 (-4x-3)
= (6x^2 +4) – ( 12x + 9)
= 6x^2 -12x -5