Скачать или смотреть Q6 Ex-5.3 Complex Number & Quadratic Equations Class11 Chapter 5th Maths CBSE By Poonam Garg

Q6 Ex-5.3 Complex Number & Quadratic Equations Class11 Chapter 5th Maths CBSE By Poonam Garg

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Complex Number and Quadratic Equations Chapter 5th Maths Class 11 | CBSE NCERT Class 11 Maths Complex Number & Quadratic Equations
   • Maths Class 11 Chapter 5th Complex Numbers...  

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Summary
A number of the form a + ib, where a and b are real numbers, is called a complex number, a is called the real part and b is called the imaginary part of the complex number.
Let z1 = a + ib and z2 = c + id. Then
(i) z1 + z2 = (a + c) + i (b + d)
(ii) z1 z2 = (ac – bd) + i (ad + bc)
For any non-zero complex number z = a + ib (a ¹ 0, b ¹ 0), there exists the
complex number 2 2 2 2
called the
multiplicative inverse of z such that (a + ib) 2 2 2 2


Question
EXERCISE 5.3
Solve each of the following equations:
1. x2 + 3 = 0 2. 2x2 + x + 1 = 0 3. x2 + 3x + 9 = 0
4. – x2 + x – 2 = 0 5. x2 + 3x + 5 = 0 6. x2 – x + 2 = 0
7. 2 2x + x + 2 = 0 8. 2 3x − 2x + 3 3 = 0
9. 2 102 x + x + = 10.
2 1 0

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