Answers

2014-05-05T14:34:19+05:30
X=2y+6 

x^3-8y^3-36xy-216 
=(2y+6)³−8y³−36(2y+6)y−216 
=8y³+6³ +3×(2y)²×6+3×2y×6² −8y³−72y²−216y−216 
=8y³+216 +3×4y²×6+3×2y×36−8y³ −72y²−216y−216 
=8y³+216 +72y²+216y−8y³ −72y²−216y−216 
=8y³−8y³ +72y²−72y²+216y −216y+216−216 
=0
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2014-05-05T23:11:19+05:30