A(x) = (3 + x)²
D(b) = (b - 5)²
G(w) (2w+1) ²
B(y) = (7-3y)²
C(x) = (3x)²
E(x) = (x + 7)(x-7)
F(x) = (1 + 3x)²
H(u) = (3u - 1)(3u + 1)
1(x) = (4x + 9) (4x - 9)