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Question

Find the product of (a+b) and 7a2b2.


A

7a2b2

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B

7a3b2+7a2b3

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C

7a2b+7ab2

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D

7a2b+7ab

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Solution

The correct option is B

7a3b2+7a2b3


a(b+c)=ab+ac (Distributive law)

7a2b2×(a+b)

=(7a2b2×a) + (7a2b2×b)

=7a3b2+7a2b3


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