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Question

Evaluate : 60pqr(p2+q2)(q2+r2)(r2+p2)30pq(p2+q2)(r2+p2)

A
12(q2+r2)
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B
2r(p2+q2)
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C
2r(q2+r2)
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D
2r(r2+p2)
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Solution

The correct option is C 2r(q2+r2)
60pqr(p2+q2)(q2+r2)(r2+p2)30pq(p2+q2)(r2+p2)

=2r(q2+r2)

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