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If x+2y=5, Prove that x^3+8y^3+30xy=125

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If x+2y=5, Prove that x^3+8y^3+30xy=125.

evaluate-the-expression
evaluate-expression

asked Feb 28, 2014 in ALGEBRA 2 by abstain12 Apprentice

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1 Answer

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The statement is .

Given that : .

Subtract from each side.

Substitute the value in the statement.

Apply formula : .

Apply distributive property : .

Group like terms.

.

Hence,the statement was proved.

answered Feb 28, 2014 by dozey Mentor

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