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Olenka [21]
3 years ago
8

If p(q-r)x^2 +q(r-p)x + r(p-q) has equal roots,then, 2/q=??

Mathematics
1 answer:
Crazy boy [7]3 years ago
7 0
The answer is <span>d) 1/p + 1/r.
Solution to this is,
</span>[r(p-q)/p(q-r)]=1
pr-qr=pq-pr
2pr=pq+qr
2pr/pqr=(pq+qr)/pqr
2/q=1/r+1/p

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