Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Quadratic Equations Sum and Product of Roots
If one root of px2 + qx + r = 0 is double of the other root, then which one of the following is correct?
1
2q2 = 9pr
2
2q2 = 9p
3
4q2 = 9r
4
More than one of the above
5
None of the above