Question

x square+2kx+4 =0 has a root x=2 find the value of k​

Answer 1

Answer:

p(X)=x^2+2kx+4=0

put X=2

p(2)=(2^2)+2(k)(2)+4=0

=4+4k+4=0

=8+4k=0

=4k=-8

=k=-8/4

=k=-2

hence the value of k is -2