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Question

Factorise: (a−b)2+4ab

A
(ab)(a+b)
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B
(ba)(a+b)
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C
(a+b)(a+b)
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D
(ab)(ab)
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Solution

The correct option is B (a+b)(a+b)
(ab)2+4ab

=a22ab+b2+4ab ....[(ab)2=a22ab+b2]

=a2+2ab+b2 ....[(a+b)2=a2+2ab+b2]

=(a+b)2

=(a+b)(a+b)

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