Answer:
The expression becomes 448 when a=4 and b=8.
Explanation:
The expression -8 (-6a - 4b) is given and we are asked to evaluate it for the conditions that a = 4 and b = 8.
Enter those values for a and b:
-8 (-6a - 4b)
-8 (-6*(4) - 4*(8)) for a=4 and b=8
-8(-24 - 32)
-8(-56)
448