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Find the value of x^3-8y^3-36 x y-216 , ...

Find the value of `x^3-8y^3-36 x y-216 ,` when `x=2y+6.`

Text Solution

Verified by Experts

`x^3−8y^3−36xy−216=x^3+(−2y)^3+(−6)^3−3(x)(−2y)(−6)`
`=(x−2y−6)(x^2+4y^2+36+2xy−12y+6x)`
`=0×(x^2+4y^2+36+2xy−12y+6x)`
`=0`
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