SSC CHSL 10 Jan 2017 Shift 3 Paper

Question : 84 of 100

Marks: +1, -0

Which of the following equations has the sum of its roots as 7?

Solution:

In a quadratic equation of the form :

ax^2+bx+c=0

the sum of the roots is given by =

-b/c

= Ratio of negative coefficient of to coefficient of

x^2

In equation (B) :

x^2 − 7x + 10 = 0

⇒ Sum of roots =

{−(−7)}/1= 7

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