Answer:
4a + 4b - 24
Explanation:
You first start off by giving (multiplying) 4 to everything that's in the parenthesis.
Second you multiply:
4 x 1a = 4a
4 x b = 4b (also remember that a variable by its self is just 1)
4 x -6 = -24
Lastly you put it together:
4a + 4b - 24
For the -24 you can either do it the way I did or this way -> (-24) but teachers will look mostly for -24 way. But use whichever one is easier for you :)
Hope this helps!