Question

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Answer 1

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Answer 2

A
ab(b-2)/2ab=(b-2)/2
б
1/x-(x+y)/xy=(y-x-y)/xy=-x/xy=-1/y
в
b/c-(b²+c²)/bc=(b²-b²-c²)/bc=-c²/bc=-c/b
г
1)a/c+c/a-2=(a²+c²-2ac)/ac=(a-c)²/ac
2)(a-c)²/ac*1/(a-c)=(a-c)/ac