Question 258528
(26-2x)(66-2x)=1,200
1,716-132x-52x+4x^2=1,200
4x^2-184x+1,716-1,200=0
4x^2-184x+516=0
4(x^2-46x+129)=0
4(x-43)(x-3)=0
x-3=0
x=3 ft. is the width of the border around the pool.
Proof:
(26-2*3)(66-2*3)=1,200
(26-6)(66-6)=1,200
20*60=1,200
1,200=1,200