(x+y)^2 = x^2 + 2xy + y^24x^2 + 12x + 9 = (2x + 3)^2(x-y)(x+y) = x^2 - y^2x^2 - y^2x^2 - y^2(p-d)^225a^2 + 10a + 1 = (5a + 1)^225x^2 - y^2(-a-2)^2m^2 - n^2(9-y)^2b^2 + 4a^2 - 4ab(9a-b)^21 + a^2 - 2a
(x+y)^2 = x^2 + 2xy + y^2
4x^2 + 12x + 9 = (2x + 3)^2
(x-y)(x+y) = x^2 - y^2
x^2 - y^2
x^2 - y^2
(p-d)^2
25a^2 + 10a + 1 = (5a + 1)^2
25x^2 - y^2
(-a-2)^2
m^2 - n^2
(9-y)^2
b^2 + 4a^2 - 4ab
(9a-b)^2
1 + a^2 - 2a