Question

given a quadratic equation 2x^2 + mx - 20 = 0, where m is a constant. find the value of m if the sum of roots of the equation is -2

Answer 1

Answer:

Step-by-step explanation:

Given equation that 2x^2 + mx - 20 = 0 is -2

Where m is constant.

Now,

Sum of roots is -b/a (-coefficient of x)/coefficient of x^2

a=2,b=m and c=-20

Sum of roots is -b/a

-m/2=-2

-m=-2(2)

M=4. ( - and - cancels)

Hence proved.