Jika g(x) = x-3 dan (fog)(x) = x²+2x-5, fungsi f(x)=... pakai caranya yaa

jawab

f{g(x)} = x² + 2x  -5
f(x -3) = x² + 2x - 5

f(x) = (x+3)² + 2(x+3) - 5
f(x) = x² +6x + 9 + 2x + 6 - 5
f(x) = x² + 8x + 10