If we're subtracting the same amount from each value:
Substitute in for the values of h, w, and l:
Multiply it out:
Also, it isn't quadratic, but rather, a cubic...but I suppose you make a quadratic in one of the intermediate steps.
Block 4 by 5 by 3 feet. Wants to reduce volume by shaving off the same amount from length width and height.
Could you give me a clue as to where I should start? I know I have to make a quad formula.
The answer is -x^3+12x^2-47x+60