Tolong yaa 25 sama 26 pake cara yg bener

Gambarnya buram
f(x) = X² - 6x + 9
g(x) = ( x² + 1 )
(fog) (-3) = ?

Cari dahulu rumus (fog)(x)
(fog)(x) = f(g(x))
(fog(x)) = ( x² + 1 )² - 6 ( x² + 1 ) + 9
(fog(x)) = (x²)² + 2 . x² . 1 + 1² - 6. x² - 6. 1 + 9
(fog(x)) = x⁴ + 2x² + 1 - 6x² - 6 + 9
(fog(x)) = x⁴ - 4x² + 4

Maka (fog)(-3) = ( -3)⁴ - 4 ( -3)² + 4
= 81 - 36 + 4 = 49 (C)