Answer:
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( a/3 - b/6 -1)^2 as expanded form:

Step-by-step explanation: You have to Simplify the expression.
Hope this helped you. Brainliest would be nice!
Answer: b) 384 sq. in.
Step-by-step explanation:
Surface area of cube = 6a^2
= 6 (8)^2
= 6 x 64
= 384 sq. in.
Take 9 from 6 = -3
Take 10 from 9 = -1
Take 50 from 40 and leave 6 = -4