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Question

Use a suitable identity to get following products.
(a2+b2)(b2a2)

A
b2a4
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B
b4a7
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C
b5a4
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D
b4a4
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Solution

The correct option is D b4a4
(a2+b2)(a2+b2)
Using,
(a+b)(ab)=a2b2
=(b2+a2)(b2a2)
=b4a4

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