The length and width of a rectangular swimming pool are 4x2+x-3 feet and x2-4. What is the perimeter of the pool?

Answer 1

perimeter = p = 2L+2w = 10x^2 +2x -14

p/2= 4x^2+x-3+x^2-4 = 5x^2 +x -7

5x^2 +x -7 -p/2 = 0

factor or use the quadratic formula

x =-1/10 + .1sqr(1+20(7+p/2))