You didn't state what the problem is that you need an answer for. I'm guessing you either want it factored or graphed. I can't draw the graph here, so I'll factor it.
You want two numbers that multiply to give -24 (the constant term) and add to give 2 (the coefficient of the x term). Start by identifying factors of -24. Thee choices are:
1 x -24 adds to -23
-1 x 24 adds to 23
2 x -12 adds to -10
-2 x 12 adds to 10
-3 x 8 adds to 5
3 x -8 adds to -5
4 x -6 adds to -2
-4 x 6 adds to 2. These are the factors you want!
f(x) = (x-4)(x+6)
Done!
