Jika f(x)=2x-√2 dang(x)= x^2-2 maka {g.f)(-√2)

f(x) = 2x - √2
g(x) = x² - 2

(gof)(-√2)=?

(gof)(x) = g(f(x))
=(2x - √2)² - 2
= 4x² - 4x√2 + 2 - 2
= 4x² - 4x√2

(gof)(-√2) = 4(-√2)² - 4(-√2)(√2)
                = 4 × 2 - 4 × (-2)
                = 8 - (-8)
                = 8 + 8
                = 16