Question

Where does the graph of x^2-x-2=y cross the x-axis?
(2,0) and (-1,0)
(0,2) and (0,-1)
(1,2) and (2,-1)
(-2,0) and (-1,0)
(0,-2) and 0,-1)

Any help is appreciated!

Answer 1

What do you get when you factor that equation?

Answer 2

y=(x-1)(x+2) is the factored version of this equation. Thus, if either of those things equaled 0, they would give you the zeroes. The zeroes are (0, -2) and (0, 1).