How do I solve the quadratic equation y^2 - 7y - 18 = 0 by factoring

Question

anonymous · Answer

@iits_avex  be respectful buddy

anonymous · Answer

If you were to factor that, you need to find two products of the last term that add up to the middle term.

anonymous · Answer

Is it the same as completing a square?

anonymous · Answer

Hey man, what's your deal? This place is for asking/answering questions so that we can help one another. if you wanna pick on somebody or just be an idiot, go do it someplace else.

anonymous · Answer

Is it the same process as completing a square?

anonymous · Answer

Not necessarily. What two factors of -18 add up to -7?

anonymous · Answer

-9 and 2

anonymous · Answer

That is not a choice though... do the signs change at any point in the process?

anonymous · Answer

Ok. Now all you do is fill that into your parenthesis. your answer is (y-9)(y+2)

anonymous · Answer

That doesn't help because it isn't a choice...
These are the choices:
   {-2, 9} 
   {-9, -2} 
   {-3, -6} 
   {-6, 3}

mathmale · Answer

The poster of these crude messages has been suspended.  Sorry for the interference with your discussion.

anonymous · Answer

@HackedSchool first option is an answer
as  explained by @rgonzalez  (y-9) (y+2) = 0
now we will write 
y-9 =0 OR y+2 = 0
y =9 OR y= -2

anonymous · Answer

I see it now! Thanks, @rgonzalez and @niksva