Question

Use the graph of y=x2−x−2 to find the solutions of x2−x−2=0 .

Answer 1

x = - 1 , x = 2

Explanation:

Using the graph to find the solutions to the equation

x² - x - 2 = 0

The solutions are the points on the x- axis where the graph crosses it

The graph crosses the x- axis at

x = - 1 and x = 2

Then the solutions are x = - 1 and x = 2

Answer 2

x=2, x=-1

Explanation:

The question is asking you for the solutions of x2-x-2=0 which means you would need to factorise and find x.

e.g. x2-x-2=0

(x-2)(x+1)=0

x = 2, -1

In this case, because you have been given the graph, you would find where the graph intersects the x-axis (the roots).