SOLUTION: If two adjacent edges of a given square were made to be 2 cm longer, the area of the resulting square contains 84 more square centimeters than the original. How long is an edge of

SOLUTION: If two adjacent edges of a given square were made to be 2 cm longer, the area of the resulting square contains 84 more square centimeters than the original. How long is an edge of

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Question 319499: If two adjacent edges of a given square were made to be 2 cm longer, the area of the resulting square contains 84 more square centimeters than the original. How long is an edge of the original square?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!

Let the length of square be x cm
the increased length = x+2
x^2+84 = (x+2)^2
x^2+84=x^2+4x+4
4x=80
x=20 cm
the length of original square
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