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Question

By how much is 5a2b2−18ab2−10a2b greater than −5a2+6a2b−7ab?


A

5a2b218ab216a2b+5a27ab

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B

5a2b218ab216a2b5a2+7ab

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C

5a2b2+18ab2+16a2b5a27ab

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D

5a2b218ab216a2b+5a2+7ab

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Solution

The correct option is D

5a2b218ab216a2b+5a2+7ab


The required result is,

(5a2b218ab210a2b)(5a2+6a2b7ab)

=5a2b218ab210a2b+5a26a2b+7ab

=5a2b218ab210a2b6a2b+5a2+7ab

=5a2b218ab216a2b+5a2+7ab


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