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Question

If P=a22ab+b2 and q=4ab, then p+qa is:

A
(ab)2+4a2b.
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B
(ab)24a2b.
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C
(ab)24ba.
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D
(ab)24b2a.
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Solution

The correct option is A (ab)2+4a2b.
It is given that p=a22ab+b2 and q=4ab, then p+qa will be as follows:

p+qa=(a22ab+b2)+a(4ab)=(ab)2+4a2b((xy)2=x2+y22xy)

Hence, p+qa=(ab)2+4a2b.

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