Jika f(x) = x2 – 4x + 5 dan g(x) =-x2 – 2x – 6 maka (f-g)(-1) adalah​

Penjelasan dengan langkah-langkah:

(f – g) (x) =

(x² – 4x + 5) – (-x² – 2x – 6)

= x² – 4x + 5 + x² + 2x + 6

= 2x² – 2x + 11

(f – g) (-1) = 2(-1)² – 2(-1) + 11

= 2 + 3 + 11 = 15

Penjelasan dengan langkah-langkah:

(f – g)(x) = f(x) – g(x)

= (x² – 4x + 5) – (-x² – 2x – 6)

= x² + x² – 4x + 2x + 5 + 6

= 2x² – 2x + 11

(f – g)(-1) = 2(-1)² – 2(-1) + 11

= 2 + 2 + 11

= 15