Question

Помогите упростить выражения

Answer 1

1)(y+1)/y(y-x)+(1-x)/(x(y-x)=(xy+x+y-xy)/xy(y-x)=(x+y)/xy(y-x)
2)y/(x-y)-(x²+y²)/2x(x-y)=(2xy-x²-y²)/2x(x-y)=-(x-y)²/2x(x-y)=(y-x)/2x
3)15/(m+2)(m-3)-12/(m+2)(m-2)=(15m-30-12m+36)/(m-2)(m+2)(m-3)=
=(3m-6)/(m-2)(m+2)(m-3)=3(m-2)/9m-2)(m+2)(m-30=3/9m+2)(m-30
4)2/x(x-2)-1/(x-2)=(2-x)/x(x-2)=-1/x