(y+4)^2 = y^2 + 8y + 16
(2x-3y)^2 = 4x^2 - 12xy + 9y^2
(-3a+5)^2 = 9a^2 - 30a + 25
(-x^2-2x)^2 = x^4 + 4x^3 + 4x^2
(y+4)^2 = y^2 + 8y + 16
(2x-3y)^2 = 4x^2 - 12xy + 9y^2
(-3a+5)^2 = 9a^2 - 30a + 25
(-x^2-2x)^2 = x^4 + 4x^3 + 4x^2