Find the value of k for which equation (x+2)(x+k)=-9 has equal roots

[Keai01]

Find the value(s) of k for which equation (x+2)(x+k)=-9 has equal roots

please help

 

[stapel]

Find the value(s) of k for which equation (x+2)(x+k)=-9 has equal roots

please help

We'll be glad to help, but first we need to see what the issue is. ("Read Before Posting") So please reply with a clear listing of your thoughts and efforts so far.

For instance, you started with your knowledge of the fact that you can solve by factoring *only* when the polynomial or whatever has zero alone on the other side of the "equals" sign. So you multiplied out the left-hand side, added to move the loose number over to the left-hand side, simplified, and... then what?

Please be complete. Thank you!

 

[topsquark]

Find the value(s) of k for which equation (x+2)(x+k)=-9 has equal roots

please help

Hint: In terms of k, what are the roots for this equation?

-Dan

 

[Dr.Peterson]

Find the value(s) of k for which equation (x+2)(x+k)=-9 has equal roots

please help

In looking for equal roots, you can expect to use a discriminant. Of course, first you need to get the equation into the right form.

What have you done so far?