Question

Спростити выраз..................................................

Answer 1

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Answer 2

(y+3)/2(y+1)-(y+1)/2(y-1)=3/(y-1)(y+1)=
=(y²-y+3y-3-y²-2y-1+6)/2(y²-1)=2/2(y²-1)=1/(y²-1)