Question

if one root of quadratic equation x^2+6x+k= 0 is h+ ​

Answer 1

Step-by-step explanation:

x^2+6x+k=0

delta=b^2-4ac. a=1, b=6, c=k

=6^2-4(1)(K)

=36-4k

=36=4k

=4k=36

k=36/4

k=9

x^2+6x+9=0

x^2+3x+3x+9=0

x(x+3)+3(x+3)=0

(x+3) (x+3)

x=-3. x=-3