Реши е уравнение x ( x +2 ) - ( x+3 ) ( x + 1) = 2x + 3

x (x + 2) - (x + 3)( x + 1) = 2x + 3 
x^2 + 2x - (x^2 + 4x + 3) = 2x + 3 
x^2 + 2x - x^2 - 4x - 3 = 2x + 3 
- 2x - 3 = 2x + 3 
- 2x - 2x = 6
- 4x = 6 
x = - 3/2 = - 1,5