Solve x2-x is greater than or equal to 20 algebraically; then graph your solution.

1st off, can someone suggest if I actually draw out a graph and graph it or did they mean put it on a number line?

and I don't know if I am using the correct method to solve..

x2 - x - 20 is greater than or equal to zero

(x-5)(x+4) is greater than or equal to zero

x = 5, -4

where do I go from there algebraically find the final solution?