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