Question 386125
x(x+1)-55 = x+x+1
x^2+x-55 = 2x+1
x^2-x-56 = 0
(x-(1/2))^2 - (1/4) = 56

x = (225/4)^(1/2) + (1/2)
x = 8

So the two numbers are 8 and 9.