This video lecture from Quadratic Equations (F.Sc. first year Mathematics) covers: Solution of exercise no 4.3. In this exercise the questions solved are reduced from radical equations to quadratic equations. You will learn how we check the roots of an equation whether it is correct or not. The extraneous roots to a radical equation are explained in detail. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.