Question

y=x^2-x-6 Must...Find...Roots! One root is (-2,0) and i think the other is...(4,0)?

Answer 1

If you plug in 4 for x, do you get 0 for y?

Answer 2

If so then 4 is a root. If not, then it's not.

Answer 3

Thanks :)

Answer 4

\[16-4-6 \ne 0\]

Answer 5

now i gotta do the long way with quadratic formula....Ugh

Answer 6

I think you can factor pretty easy.

Answer 7

What two numbers multiply to give -6
and add to give -1?

Answer 8

Hmm.. So (3,0) and (-2,0)...?!

Answer 9

Lets see:
9 - 3 - 6 = 0
so yep.

Answer 10

Yay.