G (x - 1 ) = x kuadrat + 2 G(x) = ?

g(x - 1) = x² + 2

Misal :
x - 1 = a
x = a + 1

g(x - 1) = x² + 2
g(a) = (a + 1)² + 2
g(a) = a² + 2a + 1 + 2
g(a) = a² + 2a + 3
g(x) = x² + 2x + 3