сократите дробь,пишите решение:
а)36-а²
_______ =
18+3a
б)9p²-q²
________ =
9p²+6pq+q²
36-а² (6-а)(6+а) 6-a
_______= _________ = _____
18+3a 3(6+а) 3
9p²-q² (3p-q)(3p+q) 3p-q
________ = ___________ = ______
9p²+6pq+q² (3p+q) (3p+q) 3p+q