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Question

Factorise: a2+b24+c29ab+bc323ca

A
(ab2c3)(ab2c3)
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B
(ab4c3)(ab2c3)
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C
(ab8c3)(ab2c3)
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D
(ab7c3)(ab2c3)
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Solution

The correct option is A (ab2c3)(ab2c3)
a2+b24+c29ab+bc323ca
=a2+b222+c232+2×a×b2+2×b2×c3+2×c3×a
Using, (a+b+c)2=a2+b2+c2+2ab+2bc+2ca
=(ab2c3)(ab2c3)

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