151
If the equation $qx^2 + px - r = 0$ ($q \neq 0$) has real and equal roots, then which of the following is true?
- (a)$p^2 = qr$
- (b)$p^2 = -4qr$
- (c)$q^2 = 4pr$
- (d)$q^2 = -4pr$
Show SolutionHide Solution↓
Ans. (B) $p^2 = -4qr$
If the equation qx2 + px - r = 0 ( q ≠ 0 ) has real and equal roots, then which of the following is true?
CBSE Class 10 Maths PYQ · Quadratic Equations · Nature of Roots · 1 Mark · March 2026 · Basic
Solve it yourself first — then press ↓ or tap Show Solution. Use ← → for previous / next question.