SOLUTION: PLEASE HELP!! Set up an equation and solve the following problem. Suppose that the area of a square is twenty-one times its perimeter. Find the length of a side of the square.

SOLUTION: PLEASE HELP!! Set up an equation and solve the following problem. Suppose that the area of a square is twenty-one times its perimeter. Find the length of a side of the square.

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Question 457906: PLEASE HELP!!
Set up an equation and solve the following problem.
Suppose that the area of a square is twenty-one times its perimeter. Find the length of a side of the square.
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
==> ==>
<==> s(s - 84) = 0 ==> s = 0 or s = 84. Hence the length of a side of the square is 84.
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