Tolong bantu jawab + caranya f(x) = x-1 g(x) = x² + 2x - 3 GoF(x) =

gof(x) = g(f(x))
          = g(x-1)
          = (x - 1) ² + 2 (x - 1) - 3
          = (x - 1) (x - 1) + 2 (x - 1) - 3   (jika dijabarkan)
          = x² - x - x + 1 + 2x - 2 - 3
          = x² - 4