Class 11 Maths · Chapter 4 · CBSE / NCERT
Complex Numbers and Quadratic Equations
Numbers with i, where i² = −1. You’ll learn to add, multiply and divide complex numbers, find modulus and conjugate, and solve any quadratic.
13 short lessons · about 58 minutes in all
What you’ll learn
- 1A number whose square is minus 14 min
- 2Real part and imaginary part4 min
- 3Adding and subtracting complex numbers4 min
- 4Multiplying complex numbers5 min
- 5The powers of i go round in a circle4 min
- 6Square roots of negative numbers5 min
- 7Class 9 identities still work5 min
- 8The conjugate: a mirror partner4 min
- 9The modulus: how far from zero4 min
- 10The inverse: the number that undoes it5 min
- 11Dividing complex numbers5 min
- 12Shortcuts for modulus and conjugate5 min
- 13Complex numbers on a map4 min
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A number whose square is minus 1 · about 4 minutes
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More Class 11 Maths
The other 13 chapters.
CH 1Sets14 lessonsCH 2Relations and Functions14 lessonsCH 3Trigonometric Functions14 lessonsCH 5Linear Inequalities13 lessonsCH 6Permutations and Combinations14 lessonsCH 7Binomial Theorem13 lessonsCH 8Sequences and Series14 lessonsCH 9Straight Lines14 lessonsCH 10Conic Sections14 lessonsCH 11Introduction to Three Dimensional Geometry13 lessonsCH 12Limits and Derivatives14 lessonsCH 13Statistics14 lessonsCH 14Probability13 lessons
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