Question

If x=-2 is the root of the quadratic equation x^2-3x-a=0,then the value of 'a' is ​

Answer 1

Answer:

Answer given in the picture.

Answer 2

Answer:

given

x= -2

x^2 -3x -a =0

(-2)^2 -3 *-2 -a =0

4+6 -a =0

10-a =0

-a=-10

a=10