a)
16 x²y³⁽⁴ˣy² 4 x y
---------- = --------
20 x y² 5
b)
x² - x x ( x - 1) x
--------- = ------------ = ------
2 x - 2 2 ( x - 1) 2
c)
x² - 2 x + 1 (x - 1)(x-1) x - 1
--------------- = -------------- = ------- → am simplificat pe (x-1) cu (x -1)
x² - 1 (x -1)(x+1) x + 1
d)
(x²+3x+1)(x²+3x+3)+1 x² + 3x+3+1 x²+3x+4 x(x+3)+4 x + 7
------------------------------ = ----------------- = ----------- = -------------- = ----------
(x²+3x+1)(x²+3x+1) -1 x²+3x+1-1 x²+3x x(x+3) x + 3
