(3z-5y)(3z+5y) = 9z^2 - 25y^2(7b+2k)(2k-7b) = 4k^2 - 49b^2(0.3x^2 - y)(0.3x^2 + y) = 0.09x^4 - y^2(5y+2z)^2 = 25y^2 + 20yz + 4z^2(8d-y)^2 = 64d^2 - 16dy + y^2(3zk-4b)^2 = 9z^2k^2 - 24zbk + 16b^2E^3 - 64ab + b^227a^3 + b^39a^2 - 6ab + b^2
(3z-5y)(3z+5y) = 9z^2 - 25y^2
(7b+2k)(2k-7b) = 4k^2 - 49b^2
(0.3x^2 - y)(0.3x^2 + y) = 0.09x^4 - y^2
(5y+2z)^2 = 25y^2 + 20yz + 4z^2
(8d-y)^2 = 64d^2 - 16dy + y^2
(3zk-4b)^2 = 9z^2k^2 - 24zbk + 16b^2
E^3 - 64ab + b^2
27a^3 + b^3
9a^2 - 6ab + b^2