1) a^2 b^2 - 16 = (ab + 4)(ab - 4)2) 16 c^8 - 64 = 16(c^8 - 4) = 16(c^4 + 2)(c^4 - 2)3) 9 - 25 c^8 = (3 - 5c^4)(3 + 5c^4)4) 225 - 4 k^6 = (15 - 2k^3)(15 + 2k^3)
1) a^2 b^2 - 16 = (ab + 4)(ab - 4)
2) 16 c^8 - 64 = 16(c^8 - 4) = 16(c^4 + 2)(c^4 - 2)
3) 9 - 25 c^8 = (3 - 5c^4)(3 + 5c^4)
4) 225 - 4 k^6 = (15 - 2k^3)(15 + 2k^3)