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Question

The product of 
(6a27b+5ab) and 2ab is _____.


A
12a3b10a2b2+14ab2
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B
12a3b+10a2b214ab2
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C
6a3b+5a2b27ab2
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D
12a2b+10a3b214ab2
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Solution

The correct option is B 12a3b+10a2b214ab2
=(6a27b+5ab)×2ab
=(2ab×6a2)(7b×2ab)+(5ab×2ab)
=12a3b14ab2+10a2b2
=12a3b+10a2b214ab2

Mathematics

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