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Important Questions

Quadratic Equations — Important Questions

ICSE · Class 11 · Mathematics

104 important questions from Quadratic Equations for ICSE Class 11 Mathematics, with answers. Includes multiple choice and true false questions.

104 questions25 flashcards24 formulas & key relations5 concepts

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An infographic explaining how the discriminant (D = b²-4ac) determines the nature of roots for a quadratic equation ax²+bx+c=0 with real coefficients, including graphical interpretations.
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104 Questions·
multiple choicetrue false

Important Questions from Quadratic Equations

1multiple choice

The roots of x²−5x+6=0 are:

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2 and 3

x²−5x+6=0. D=25−24=1. x=(5±1)/2 → x=3 or x=2. Verify: 2×3=6 ✓ and 2+3=5 ✓.

2multiple choice

For the equation 9x²−12x+4=0, the discriminant is:

3true false

True or False: A quadratic equation with D<0 has no roots at all.

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False

False. D<0 means no REAL roots, but the equation still has exactly 2 complex (imaginary) roots. A quadratic always has 2 roots in ℂ.

4multiple choice

The equal root of 9x²−12x+4=0 is:

Show answer

2/3

D=0, so equal root = −b/2a = −(−12)/(2×9) = 12/18 = 2/3.

+100 more questions on Quadratic Equations (ICSE Class 11 Mathematics)

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Frequently Asked Questions

What are the important topics in Quadratic Equations for ICSE Class 11 Mathematics?
Key topics in Quadratic Equations include Basic Meaning and Standard Form, Discriminant and Nature of Roots, Graph of a Quadratic Function, Roots and Coefficients. Study these first, then practise questions on each for Class 11 exams.
How many important questions are there in Quadratic Equations?
Super Tutor has 104 practice questions for Quadratic Equations, including multiple choice, true false questions. A sample with answers is on this page.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 11 Mathematics Important Questions

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