NCERT Solutions for Class 11 Maths Chapter 5 Ex 5.3

# NCERT Solutions for Class 11 Maths Chapter 5 Ex 5.3

## NCERT Solutions for Class 11 Maths Chapter 5 Complex Numbers and Quadratic Equations Ex 5.3

NCERT Solutions for Class 11 Maths Chapter 5 Complex Numbers and Quadratic Equations Ex 5.3 are the part of NCERT Solutions for Class 11 Maths. Here you can find the NCERT Solutions for Class 11 Maths chapter 5 Complex Numbers and Quadratic Equations Ex 5.3.

Solve each of the following equations:

### Ex 5.3 Class 11 Maths Question 1.

x2 + 3 = 0

Solution.
Given equation is: x2 + 3 = 0 x2 = -3
x = ±√-3 = ±√3i2               [Since i2 = -1]

x = ±√3 i

### Ex 5.3 Class 11 Maths Question 2.

2x2 + x + 1 = 0

Solution.
Given equation is: 2x2 + x + 1 = 0
Comparing the given equation with the general form ax2 + bx + c = 0, we get a = 2, b = 1 and c = 1.

### Ex 5.3 Class 11 Maths Question 3.

x2 + 3x + 9 = 0

Solution.
Given equation is: x2 + 3x + 9 = 0
Comparing the given equation with the general form ax2 + bx + c = 0, we get a = 1, b = 3 and c = 9.

### Ex 5.3 Class 11 Maths Question 4.

-x2 + x – 2 = 0

Solution.
Given equation is: -x2 + x – 2 = 0
Comparing the given equation with the general form ax2 + bx + c = 0, we get
a = -1, b = 1 and c = -2.

### Ex 5.3 Class 11 Maths Question 5.

x2 + 3x + 5 = 0

Solution.
Given equation is: x2 + 3x + 5 = 0
Comparing the given equation with the general form ax2 + bx + c = 0, we get a = 1, b = 3 and c = 5.

### Ex 5.3 Class 11 Maths Question 6.

x2 – x + 2 = 0

Solution.
Given equation is: x2 – x + 2 = 0
Comparing the given equation with the general form ax2 + bx + c = 0, we get a = 1, b = -1, c = 2.

### Ex 5.3 Class 11 Maths Question 7.

2x2 + x + 2 = 0

Solution.
Given equation is: 2x2 + x + 2 = 0
Comparing the given equation with the general form ax2 + bx + c = 0, we get a = 2, b = 1 and c = 2.

### Ex 5.3 Class 11 Maths Question 8.

3x2 – √2x + 33 = 0

Solution.
Given equation is: 3x2 – √2x + 33 = 0

Comparing the given equation with the general form ax2 + bx + c = 0, we get a = √3, b = -√2 and c = 3√3.

### Ex 5.3 Class 11 Maths Question 9.

x2 + x + 1/2 = 0

Solution.
Given equation is: x2 + x + 1/2 = 0
Comparing the given equation with the general form ax2 + bx + c = 0, we get a = 1, b = 1 and c = 1/2.

### Ex 5.3 Class 11 Maths Question 10.

x2 + x/2 + 1 = 0

Solution.
Given equation is: x2 + x/2 + 1 = 0

Comparing the given equation with the general form ax2 + bx + c = 0, we get a = 1, b = 1/2 and c = 1.