Question

if x=-2 x=1/2 are solution of 5x+kx+a=0 then find the value of a and k​

Answer 1

Answer:

5x+Kx+a=0

x= -2 & x=1/2

if x = -2

-10-2k+a=0

-2k+a=10.....(1)

again, if x=1/2

5/2+k/2+a=0

(5+k+2a)/2=0

5+k+2a=0

k+2a= -5.....(2)

adding eq(2)×2 in eq(1)

-2k+a+2k+4a=10-10

5a=0

a=0 answer and k= -5