$(a + b) (a - b) (a^{2} + b^{2}$ ) is:

(

a^{3} - b^{3}

)

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(

a^{3} + b^{3}

)

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(

a^{4} + b^{4}

)

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(

a^{4} - b^{4}

)

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Solution

The correct option is D ( $a^{4} - b^{4}$ )
$(a + b) (a - b) (a^{2} + b^{2}$ )

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

$= (a^{4} - b^{4}$ )

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