Merp help please

Question

Merp help please <3
Which of the following is a factor of x2 - 5x - 24?
	x + 3
	x - 6
	x + 4
	None of the above

anonymous · Answer

x² - 2x - 24 = 0 
(x - 6)(x + 4) = 0 
(x - 6) and (x + 4) are the two factors 
x = 6 or x = -4 are the two roots
im so confused did i do this wrong?

anonymous · Answer

that second one was done perfectly well

anonymous · Answer

seccond one? oh! i mixed up the 5 with a 2
 no wonder!

anonymous · Answer

thank you!

anonymous · Answer

was the original written wrong?

anonymous · Answer

or the second one?

agent0smith · Answer

Just find two numbers that multiply to -24 and add up to 5... -8 and +3.

Also, if x+3 is a factor, then x=-3 is a zero
if x-6 is a factor, then x=6 is a zero
if x+4 is a factor, then x=-4 is a zero. 

So if you plug in those x values, and the  x2 - 5x - 24 equals zero, then you've found your factor