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Question

Factorize:
4a249b2+2a7b4a2−49b2+2a−7b.

A
(2a7b)(2a+b+6)
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B
(2a7b)(2a+7b+1)
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C
(2ab)(2a+7b+3)
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D
(2ab)(2a+b+9)
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Solution

The correct option is B (2a7b)(2a+7b+1)
4a249b2+2a7b
=(2a)2(7b)2+(2a7b)
=(2a+7b)(2a7b)+(2a7b)
=(2a7b)(2a+7b+1)

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