Descompuneti in factori (y,t inegal 0):
Am nevoie doar de cele incercuite:
Mersi!

c)(x/6 - 5y)(x/6 + 5y)
d)(x - 9/8)(x + 9/8)
e)(a/2 - 4b/11)(a/2 + 4b/11)
f)(2abc/7 - 1)(2abc/7 + 1)