Question

) f(x) = 2x² + 7×-4 f(x) = -x² + 3x + 4 (​

Answer 1

Jawaban:

Jawabannya adalah 26

Konsep :

(g-f)(x) = g(x) - f(x)

Jawab :

(g-f)(x) = g(x) - f(x)

2x² - 7x + 6 = g(x) - (3x + 4)

2x² - 7x + 6 = g(x) -3x - 4

2x² - 7x + 6 + 3x + 4 = g(x)

2x² - 4x + 10 = g(x)

g(x) = 2x² - 4x + 10

Maka :

g(-2) = 2(-2)² - 4(-2) + 10

= 2(4) + 8 + 10

= 8 + 8 + 10

= 16 + 10

= 26

Jadi g(-2) = 26