1) x^2 - 9 = (x + 3)(x - 3)2) 25 - 4y^2 = (5 + 2y)(5 - 2y)3) 36m^2 = (6m)^24) a^2b^2 - 81 = (ab + 9)(ab - 9)5) 100m^6 - 1 = (10m^3 + 1)(10m^3 - 1)
1) x^2 - 9 = (x + 3)(x - 3)
2) 25 - 4y^2 = (5 + 2y)(5 - 2y)
3) 36m^2 = (6m)^2
4) a^2b^2 - 81 = (ab + 9)(ab - 9)
5) 100m^6 - 1 = (10m^3 + 1)(10m^3 - 1)