#quadratic-rootsMCQ

Nature of Roots

For ax^2 + bx + c = 0, the discriminant is b^2 - 4ac.

Practice Class 10 Maths MCQ on quadratic roots and discriminant with answer, solution, and video explanation.

If the roots of a quadratic equation are equal, then its discriminant is:

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FAQ

What is the discriminant of a quadratic equation?

For $a x 2 + b x + c = 0$ , the discriminant is $b 2 - 4 a c$ .

When are the roots of a quadratic equation equal?

The roots are equal when the discriminant is exactly equal to 0.

Start with the question, try the answer once, then open the solution. Use the FAQ to clear the common confusion before moving to the next tag.

Common mistake: Students often remember that real roots need a non-negative discriminant but forget that equal roots require exactly zero.

Learn how discriminant decides the nature of roots. Equal roots means $b^2 - 4ac = 0$.