A = 36 − 25x
2
A = (6 − 5x)(6 5x)
B = 100 60x 9x
2
B = (10 3x)²
C = 2i(i 1) 2i(2 i)
C = 2i(i 1 2 i)
C = 2i(2i 3)
D = b
2 − 10b 25
D = (b − 5)²
E = (2 − x)
2 (2 − x)(9 x)
E = (2 − x)[(2 − x) ( 9 x)]
E = (2 − x)(2 − x 9 x)
E = 11(2 − x)
F = (5x 1)2 − 81
F = (5x 1 − 9)(5x 1 9)
F = (5x − 8)(5x 10)
G = (7d 2)2 − (3d 4)2
G = [(7d 2) − (3d 4)][(7d 2) (3d 4)]
G = (4d − 2)(10d 6)
