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Question

Which of the following is a factor of (49x2−1)+(1+7x)2 ?


A

1-7x

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B

1+7x

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C

49x

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D

x+1

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Solution

The correct option is B

1+7x


49x21 = (7x+1)(7x-1)

Hence, the common factor for the given polynomial expression is (7x+1).


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