Example 9 - Chapter 5 Class 11 Complex Numbers

Last updated at Sept. 24, 2018 by Teachoo

Example 9 - Solve x2 + 2 = 0 - Chapter 5 Class 11 - Quadaratic equation

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Transcript

Example 9 - Chapter 5 Class 11 Complex Numbers - NCERT Solve 𝑥^2 + 2 = 0 𝑥2 + 2 = 0 𝑥2 = 0 – 2 𝑥2 = – 2 𝑥 = ± √(−2) = ± √(−1 × 2) (i = √(−1 )) = ± √(−1) × √2 = ± i × √2 = ± √2i

Quadaratic equation

Example 9 You are here

Two complex numbers equal →

Chapter 5 Class 11 Complex Numbers

Concept wise

Quadaratic equation
Two complex numbers equal
Convert to a + ib form
Identities (square, cube of 2 complex numbers)
Division
Power of i(odd and even)
Conjugate
Modulus,argument
Polar representation
Proof- Replacing iota with -iota
Proof- Taking general complex numbers
Proof- Solving
Proof- Using modulus conjugate property (Pg 102)

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.