Question

HE
a²-1
1)
1-a
2)
(x+1)2. STEL
x²-1'
m-n
h9803) (n-m)²'
N
24 SE
55PS UN
poun
a²-1
4) (a-1)²

Answer 1

Объяснение:

1) (а-1)(а+1)/(1-а) = -(a-1)(a+1)/(a-1)= -a+1

2) (x+1)²/(x-1)(x+1) = (x+1)/(x-1)

3)-(n-m)/(n-m)² = -(1)/(n-m)

4)(a-1)(a+1)/(a-1)² = (a+1)/(a-1)