Question

If p(q-r)x^2+q(r-p)x+r(p-q)=0has equal roots then 2/q

Answer 1

p(q-r)x^2+q(r-p)x+r(p-q)=0

pq-pr·x^2+qr-pq·x+pr-qr=0

pq-pq-pr+pr+qr-qr+pr·x^2·x=0

x^2·x+pr=0

and then idk