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Maths CBSE Live product
Class 10 (2026-27)
Quadratic Equations
Nature of roots
2.
Find the value of the variable for equal roots
Question:
4
m.
If the following equations have
two equal roots
, then find the value of
'\(a\)'.
1
.
\(9x^2 + ax + 1 = 0\)
\(a = 16\) or \(a = -16\)
\(a = 4\) or \(a = -4\)
\(a = 6\) or \(a = -6\)
\(a = \sqrt{6}\) or \(a = -\sqrt{6}\)
2
.
\(x^2 + ax + 25 = 0\)
\(a = 10\) or \(a = -10\)
\(a = 2 \sqrt{5}\) or \(a = -2 \sqrt{5}\)
\(a = 5 \sqrt{2}\) or \(a = -5 \sqrt{2}\)
\(a = 100\) or \(a = -100\)
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