Solve x2 + 18 = –9x.
I got up to x2+18+9x=0
now i'm stuck :/ help?

Question

Solve x2 + 18 = –9x.
I got up to x2+18+9x=0 
now i'm stuck :/ help?

anonymous · Answer

This particular equation can be solved by factoring.  You only need to find two numbers that when multiplied give 18, but when added give 9.  Can you think of any such 2 numbers?

anonymous · Answer

(6)(3) = 18     and 6 + 3 = 9

Does that help you?

anonymous · Answer

oooooh ok! So my final answer is x=-6 and x=-3?

anonymous · Answer

Then you take those 2 numbers and put them in the blank area:

(x +    ) (x +    ) = 0

anonymous · Answer

Yes, those are the zeros because 

(x + 6) (x + 3) = 0

Good work!

anonymous · Answer

Thank you! (:

anonymous · Answer

Good luck in all of your studies and thx for the recognition! @Clubparadise 

And you're welcome!

anonymous · Answer

no problem (: