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Class 10 Mathematics Quadratic Equations Nature of RootsHard

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For which (q) will (3x^2+qx+12=0) have equal roots?

Answer and explanation

Correct answer: (q=\pm12)

For equal roots, (D=0), so (q^2-144=0) and (q=\pm12). In exams, both signs of (b) may be possible.

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Quadratic Equations Nature Of Roots Parameter Nature Of Roots Quadratic Equations Mathematics Class 10 Mcq

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