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Question

Simplify (a2b2)2.

A
a42a2b2+b4
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B
a4+2a2b2+b4
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C
a22a2b2b4
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D
a4+2a2b2b4
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Solution

The correct option is D a42a2b2+b4
(a2b2)2
Using,
(ab)2=a22ab+b2 we get
=(a2)22(a2)(b2)+(b2)2
=a42a2b2+b4

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