Question 1106714
For any three consecutive numbers prove algebraically that the largest number and the smaller number are factors of the number that is one less than the square of the middle number.
let numbers are x x+1 x+2
we have to prove that 
x(x+2)=(x+1)^2 -1 by solving Rhs 
(x+1)^2 -1
X^2 +2x+1-1
x^2+2x
x(X+2)
proved (x+1)^2 -1=x(x+2)