x^2 -4x+4
(2x+2)^2
( 4x+1)^2
x^2-14x+49
(6x+5)^2
x^2 -16x+64
(x - 4)^2
(-x+8)^2
4x^2+8x+4
16x^2 +8x+1
x^2 - 8x +16
(x -2)^2
(x - 7)^2
36x^2 +60x+25
