SOLUTION: What quadratic equation would I use to find the perimeter, length and width if the area size is 4200?

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Question 872940: What quadratic equation would I use to find the perimeter, length and width if the area size is 4200?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x and y dimensions;
xy=4200 and p for perimeter is p=2x+2y.

You only have enough information to make highlight%28p=2%284200%2Fy%29%2B2y%29 or highlight%28p=2x%2B2%284200%2Fx%29%29; or to solve each of these for y in terms of p or to solve x in terms of p. You need to know which variables are known and which variables are unknown.

Either py=8400+2y^2, highlight%282y%5E2-py%2B8400=0%29
OR
px=2x^2+8400, highlight%282x%5E2-px%2B8400=0%29