Question

One of the roots of equation x²+mx-5= 0 is 2; find m.
(A) -2
(B) -1/2
(C)1/2
(D) 2

Answer 1

Hi ,

It is given that one root of quadratic equation

x² + mx - 5 = 0 is 2.

To find m we have to substitute m = 2 in

given equation.

Now ,

2² + m × 2 - 5 = 0

4 + 2m - 5 = 0

2m -1 = 0

2m = 1

m = 1/2

Therefore ,

Option ( C ) is correct.

I hope this helps you.

: )

Answer 2

Heya !!




X² + MX - 5 = 0


(2)² + M × 2 - 5 = 0


4 + 2M - 5 = 0


2M - 1 = 0



M = 1/2


Hence,


Option ( C ) is right answer.