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**sakonpure6** Okay, this question is giving me trouble.I do not under stand it... the derived equation from the question is x(24-2x)(30-2x) = 1040.

-First of all i do not under stand the (24-2x) or the (30-2x) because how do they represent the length and width of the square? Imagine i have a rectangle and I shade out two square corners, I would be left with just the inside which is not the dimension of the small square? (hope that made sense >.<).

-Where on earth does the x before (24-2x) come from? Is it there to compensate that we are dealing with volume (degree 3)?

I appreciate your time and help, thank you in advance.