A quadratic equation has two roots. These roots are found either by factorizing the quadratic equation or by using the formula (-b + root (b

Here is a typical quadratic equation question

If m and n are the roots of the quadratic equation x

A. 22

B. 24

C. 32

D. 20

E. 18

Correct Answer is Choice B. 24.

m and n are roots of the equation.

We have to find the value of m

m

(m + n), the sum of the roots of a quadratic equation of the form ax

mn, the product of the roots of the equation = c/a

The sum of the roots of the equation x

Product of the roots of the equation = -2.

Hence, (m + n)

Labels: GMAT Quadratic Equations, GMAT Roots of Equations, product of roots, sum of roots