x(x-1)(x+5)=(x+3)^2(x-2)

X *( X - 1 )*( X + 5 ) = ( X + 3 )^2 * ( X - 2 ) 
( X^2 - X )*( X + 5 ) = ( X - 2 )*( X^2 + 6X + 9 ) 
X^3 + 5X^2 - X^2 - 5X = X^3 + 6X^2 + 9X - 2X^2 - 12X - 18 
X^3 + 4X^2 - 5X = X^3 + 4X^2 - 3X - 18 
- 5X = - 3X - 18 
- 2X = - 18 
X = 9