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Question

The expanded form of an expression is (xy)(x2+xy+y2). Which of the following is the expression?


A

x2 + y2

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B

x3 + y3

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C

x3 – y3

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D

x2 – y2

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Solution

The correct option is C

x3 – y3


The expansion of the algebraic identity x3-y3 is (xy) (x2+xy+y2).

Like (x)(x2+xy+y2)(y)(x2+xy+y2) = x3+x2y+xy2x2yxy2y3​ = x3y3


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