Question 666
I am going to assume that all you have to do is factor the problem, instead of actually finding out what x is. If you need to find out what x is, then there needs to be an equals sign in the original problem.
 
You want to look for two numbers that multiply to 24 and add to -10.
 
Factors of 24:
1 * 24
2 * 12
3 * 8
4 * 6
 
Out of these factors (things that multiply to equal a product) the two that work are the 4 and 6, since -4 + -6 = -10. 
 
Next place these two numbers with the x's in thw two binomials as shown below:
(x - 4)(x - 6)
 
That is the factored version of your expression.