F(x)= x²-5x-7 dan g(x)=-2x + 3 jika nilai (f-g)(x)=0 maka nilai x adalah

(f-g)(x) = (x² – 5x – 7) – (-2x + 3)
= x² – 5x – 7 + 2x – 3
= x² – 3x – 10 = 0
x² – 5x + 2x – 10 = 0
x(x – 5) + 2(x – 5) = 0
(x + 2)(x – 5) = 0, ketemu x = -2 dan x = 5