For what value of m, the roots of the equation 3x² + 2x + m = 0 has equal roots? 1/3
- m = 1/3
- m = 3
- m = -1/3
- None of these
Explanation
For equal roots, discriminant D = 0
For 3x² + 2x + m = 0:
a = 3, b = 2, c = m
D = b² - 4ac = 2² - 4(3)(m) = 4 - 12m
Set D = 0:
4 - 12m = 0
12m = 4
m = 1/3
Last verified on 09-06-2026
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