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Ex 4.3, 2 - Find roots using quadratic formula (i) 2x2 - - Solving by quadratic formula - Equation given

Ex 4.3, 2 - Chapter 4 Class 10 Quadratic Equations - Part 2

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Ex 4.3 ,2 Find the roots of the quadratic equation using quadratic formula (i) 2x2 7x + 3 = 0 2x2 7x + 3 = 0 Comparing equation with ax2 + bx + c = 0 a = 2, b = 7, c = 3 We know that D = b2 4ac D = ( 7)2 4 2 3 D = ( 7 7) (4 2 3) D = 49 24 D = 25 The roots to equation is given by x = ( )/2 Putting values x = ( ( 7) 25)/(2 2) x = (7 (5^2 ))/4 x = (7 5)/4 Solving Both Hence , the roots to equation are 3 and 1/2 .

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.