Step-by-step explanation:

Answer:
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Answer:
108
Step-by-step explanation:
4−22+135−9
=−18+135−9
=117−9
=108
The dimensions of the base of Box 1 are x by 3x.
The base area of Box 1 is:
3x^2
Length = x + y
Area of a square = Length x Length
The expression can be :
1) Area of the square = (x + y)(x + y)
2) Area of the square = (x + y)²
3) Area of the square = x² + 2xy + y²