A rectangular painting with a width of x centimeters has an area x^2 + 50x square centimeters. Find a binomial that represents the length.
Area = length x width
but width = x, let the length be l
so x(l) = x^2 + 50x
l = (x^2 + 50x)/x
= x + 50
but width = x, let the length be l
so x(l) = x^2 + 50x
l = (x^2 + 50x)/x
= x + 50