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Question

Simplify: (2.5p1.5q)2(1.5p2.5q)2

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Solution

(2.5p1.5q)2(1.5p2.5q)2

Using identity (ab)2=a22ab+b2
=6.25p27.5pq+2.25q2(2.25p27.5pr+6.25q2)
=6.25p27.5pq+2.25q22.25p2+7.5pq6.25q2)
=4p24q2


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