(x+2)^2 = x^2+12 tolong jawab pakai cara keterangan:^pangkat

(x + 2)^2 = x^2 + 12
x^2 + 4x + 4 = x^2 + 12
x^2 - x^2 + 4x = 12 - 4
4x = 8
x = 2