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In Delta PQR ,let bar(QR)=bar(a),bar(RP)...

In `Delta PQR` ,let `bar(QR)=bar(a),bar(RP)=bar(b)` and `bar(PQ)=bar(c)`. If `|bar(a)|=3,|bar(b)|=4` and `(bar(a)*(bar(c)-bar(b)))/(bar(c)*(bar(a)-bar(b)))=(|bar(a)|)/(|bar(a)|+|bar(b)|),` then the value of `|bar(a)timesbar(b)|^(2)` is equal to

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