Class 10 Mathematics — Chapter 4: Quadratic Equations
67 practice questions · 23 Easy · 23 Medium · 21 Hard
Free NCERT-aligned multiple-choice practice for Class 10 Mathematics, Chapter 4 (Quadratic Equations). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 67.
Sample questions
Which of the following is a quadratic equation?
A quadratic equation has the form ax² + bx + c = 0, with a ≠ 0. Only (a) fits.
The sum of a number and its reciprocal is 10/3. The number is:
Let x + 1/x = 10/3 ⇒ 3x² − 10x + 3 = 0 ⇒ (3x − 1)(x − 3) = 0 ⇒ x = 3 or 1/3.
For what value of k does kx² − 4x + 4 = 0 have equal roots?
Equal roots ⇒ D = 0. b² − 4ac = 16 − 16k = 0 ⇒ k = 1.
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