Question

Where does the graph of x2 - x - 2 = y cross the x-axis?

Answer 1

Factor
x^2 -x -2 = 0
for the answer.

Answer 2

In google type:
"quadratic equation online"

When you see list of result click on:

webgraphingcom/quadraticequation_quadraticformula.jsp

When this page be open in rectacangle type:

x^2-x-2=0

and click option solve it!

You will see solutions of this equation Step-by-step

Then in google type "functions graphs online"

When you see list of results click on:
rechneronline.de/function-graphs/

When page be open in blue rectacangle type: x^2 -x -2
and click option Draw

You will see graph of function.

By the way solutions is: x= -1 and x=2