Exercise 4.3 Chapter 4 Quadratic Equations Class 10 Maths

Chapter 4 Quadratic Equations Lecture 4

Thursday, April 29, 2021

Agam Sir

Video Format

Topics/Questions discussed in this video:

00:00:40 Derivation for Quadratic formula

00:23:00 NCERT Exercise 4.3 Question 3 Find the roots of the following equations:
(i) x - \frac{1}{x} = 3,\,\,x \ne 0
(ii) \frac{1}{{x + 4}} - \frac{1}{{x - 7}} = \frac{{11}}{{30}},\,\,x \ne  - 4,\,\,7

00:32:00 NCERT Exercise 4.3 Question 4 The sum of the reciprocals of Rehman’s ages, (in years) 3 years ago and 5 years from now is 1/3. Find his present age.

00:36:50 NCERT Exercise 4.3 Question 5 In a class test, the sum of Shefali’s marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects.

00:43:10 NCERT Exercise 4.3 Question 6 The diagonal of a rectangular field is 60 metres more than the shorter side. If the longer side is 30 metres more than the shorter side, find the sides of the field.

Agam Sir

Agam Sir


Ashish Kumar a.k.a Agam Sir has vast experience of 12+ years of teaching Mathematics and Physics. He has skills (academic and vocational) that go with working alongside people, especially young people, their parent(s) and the institutes that works with him. He always seek to be an agent of positive change and progression, a mentor/ trainer/ educator for learners/students, seeing that their needs are ideally met.