Which expression is equivalent to (12^4)^2/9

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

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Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000