diketahui (f ° g)(x) = x²+4x-7 . Tentukan f(x) jika g(x) = x-2 dan g(x) jika f(x) = x-2 !!

Kelas 10 Matematika
Bab Fungsi Komposisi

1] (fog) (x) = x² + 4x - 7
f(x - 2) = x² + 4x - 7
f(x + 2 - 2) = (x + 2)² + 4(x + 2) - 7
f(x) = x² + 4x + 4 + 4x + 8 - 7
f(x) = x² + 8x + 5

2] (fog) (x) = x² + 4x - 7
g(x) - 2 = x² + 4x - 7
g(x) = x² + 4x - 7 + 2
g(x) = x² + 4x - 5