original dimensions of the Shed are 8 ft long by 7 ft wide. wants to triple area of Shed by adding same # of ft to both length and width. What will be new dimensions of the Shed after

Answer 1

8x7 = A

(8+x)(7+x) = 3A = 3(56) = 168

x^2 + 15x +56 = 168

x^2 +15x - 112 = 0

use the quadratic formula

x = about 5.47 feet added to each side triples the area

168 = 13.47(12.47) = 168