Find the value of x^3 - 8 y^3 -36 xy – 216, when x = 2 y + 6 *
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Step-by-step explanation:
x^3-8y^3-36xy-216
(2y+6)^3-8y^3-36y(2y+6)-216
8y^3+216+72y^2+216y-8y^3-72y^2-216y-216
=====000
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