(-9x^2+y^3) (9x^2+y^3) using identity – InterviewSolution

1.	(-9x^2+y^3) (9x^2+y^3) using identity
Answer» y^3)(-9x^2+y^3)=(-9x^2+y^3)^2=[(-9x^2)^2+2×{-9x^2}×y^3+(y^3)^2]=81x^4+(-18x^2 y^3)+y^6=81x^4 - 18^2 y^3 +y^6

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