(3x-7y)^3 + (10-3 x)^3 + 9y (3x-7y)(10 y-3x)
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Answer:
27 y^3
Step-by-step explanation:
27x^3 - 343y^3 - 189x^2y + 441xy^2 + 1000y^3 - 27x^3 - 900xy^2 + 270x^2y + 459xy^2 - 81x^2y - 630y^3
=(27x^3 - 27x^3) + (-343y^3 + 1000y^3 - 630y^3) + (-189x^2y + 270x^2y-81x^2y) + (441xy^2 - 900xy^2 + 459xy^2)
= 27y^3
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