Question

A rectangle stained glass window is 2 feet by 4 feet. A clear glass border is constructed around the stained glass window. The width of the border is equal and was made out of 7 square feet of clear glass. What is the width of the border.

Answer 1

4x² + 2(2x) + 2(4x) = 7

4x² + 12x - 7 = 0

(2x + 7)(2x - 1) = 0

2x - 1 = 0, so x = 1/2 foot