Задача 51514 ...

tolot

2020-05-25 22:15:27

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7) x+4
8) 3y-1
9) x-y
10) x-1

vk397114329

2020-05-25 14:39:05

По свойству дроби: a/b=(a*n)/(b*n)
7) 3/(x-2)=3*(x+2)/(x^2-4)
8) (y+1)/(3y+1)=(y+1)*(3y-1)/(9y^2-1)
9) 2xy/(x+y)=2xy*(x-y)/(x^2-y^2)
10) (x+1)/(x-1)=(x+1)*(x-1)/(x-1)^2