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

Answer 1

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?

Answer 2

that second one was done perfectly well

Answer 3

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

Answer 4

thank you!

Answer 5

was the original written wrong?

Answer 6

or the second one?

Answer 7

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