Question

You are building a rectangular dog pen with an area of 90ft^2.you want the length of the pen to be 3ft longer than twice its width. write an equation that can be used to find the width w of the pen

Answer 1

Let width be w.

Length = 3 + w

Area = 90

L*W = 90

w(3 + w) = 90

3w + w² = 90

w² + 3w - 90 = 0