27y3 + 125z3
_9y^2_-15yz_ _+ 25z^2
3y + 5z )27y3 + 0y^2z + 0yz^2 +125z3
27y^3 + 45y^2z
-45y^2z + 0yz^2
-45y^2z + 75yz^2
75yz^2 + 125 z^3
75yz^2 + 125z^3
formula for addition of cubes
a3 + b3 = (a + b)(a2 – ab + b2)
(3y +5z)(9y^2 - 15yz +25z^2)
(3y + 5z)^2 (3y - 5z)