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" 13.If "2x+y=-5," prove that "8x^(3)+y^...

" 13.If "2x+y=-5," prove that "8x^(3)+y^(3)-30xy+125=0

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If 3x + 2y = -1 , then prove that 27x^3+8y^3+1-18xy = 0

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Find the value of 8x^(3)+y^(3)-30xy+125 if 2x+y=-5

If y=x^3log""1/x , Prove that , xy_2-2y_1+3x^2=0 .

If x+ 5y= 10 , find the value of x^(3) + 125y^(3) + 150xy - 1000

Factorize: 8x^(3)-125y^(3)+180xy+216

Factorize: 125+8x^(3)-27y^(3)+90xy

Facorise: 125-8x^3-27y^3-90xy

If 2x+3y=13 and xy=6, find the value of 8x^(3)+27y^(3)