Question

find the value of
Pq+qr+rp when p+q+r=√17 and p2+q2+r2​

Answer 1

You haven't posted the value of

$p {}^{2} + q {}^{2} + r {}^{2} \\ i \: have \: taken \: p {}^{2} + q {}^{2} + r {}^{2} = 9$

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