Answer:
a. 2
b. 8(-4)
c. (37)
d. (60 + 8)
Explanation:
This just shows how to expand brackets. So to expand 2(9+4) you would, do 2*9 + 2*4 and same for b.
Part d is a little different because it can be any two numbers that add up to 68 (here I just put the most simple one I could think of).