f(x) = x2 g(x) = 1 - 2x (f o g) (a) = 25 a=?

f(x) = x²
g(x) = 1 - 2x

(f o g) (a) = 25
f(1 - 2a) = 25
(1 - 2a)² = 25
4a² - 4a + 1 = 25
4a² - 4a - 24 = 0
semua bagi 4
a² - a - 6 = 0
(a - 3) (a + 2) = 0
a = 3 V a = -2

a = 3 atau a = -2