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

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- August 28th 2009, 06:30 AMRaphaelB30Another quad formula word prob
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 - August 28th 2009, 06:44 AMRobLikesBrunch

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.