$(x + y) (x - y) (x^{2} + y^{2}$ ) is equal to

( - )

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x³+ y³

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( + )

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x⁴- y⁴

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Solution

The correct option is D
x⁴- y⁴

$(x + y) (x - y) (x^{2} + y^{2}$ )

$= (x^{2} - y^{2}) (x^{2} + y^{2})$

$∵ (a + b) \times (a - b) = (a^{2} - b^{2})$

$= (x^{4} - y^{4}$ )

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