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If the quadratic equation $ax^2 + 2bx - c = 0$ ($a \neq 0$) has real and equal roots, then which of the following is true?
- (a)$b^2-ac$
- (b)$b^2 = 4ac$
- (c)$b^2 = ac$
- (d)$b^2 = -4ac$
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(A) $b^2 = ac$
If the quadratic equation ax2 + 2bx - c = 0 ( a ≠ 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
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