Odpowiedź :
x-2 = x
x + 1 = x+2
(x-2)(x+2) = x(x+1)
x² + 2x - 2x - 4 = x² +x
x² + 2x - 2x -4 - x² - x = 0
-4 - x = 0
-x = 4 /(-1)
x = -4
x-2 = x
x + 1 = x+2
(x-2)(x+2) = x(x+1)
x² + 2x - 2x - 4 = x² +x
x² + 2x - 2x -4 - x² - x = 0
-4 - x = 0
-x = 4 /(-1)
x = -4