Answer:
The correct answer to you problem is,

:
Distrubute them first:
( x - 6 )( x + 4 )
x ( x + 4 ) - 6( x + 4 )
x (x + 4) - 6(x + 4)
+ 4x - 6( x + 4)
+ 4x - 6( x + 4 )
+ 4x - 6x - 24
Combine like terms:
+ 4x - 6x - 24
- 2x - 24
Thus, your answer is,
