1) (x + 7)(x - 72) (3 + x)(3 - x3) (5x + 9)(5x - 94) (10x + 8y)(10x - 8y5) (x + 1)(x - 16) (1 + 6x)(1 - 6x)
1) (x + 7)(x - 7
2) (3 + x)(3 - x
3) (5x + 9)(5x - 9
4) (10x + 8y)(10x - 8y
5) (x + 1)(x - 1
6) (1 + 6x)(1 - 6x)