Question

1-x+yx=

1- x-yx+y=

1x+y+1x-y=

2y-x-1x-y=

aa-b-a+ba-b=

aa-b-a+bb-a=

aa-b+a+b2a-2b=

aa-b+ab(a-b)во 2 степени=

aa-b-a-ba=

Answer 1

1-y+x/x= x-x+y/x= y/x

1-x-y/x+y= x+y/x+y - x-y/x+y= 0

1x+y+1x-y= x-y+x+y/x^2-y^2= 0

2y-x-1x-y=-2x-y -1x-y=-3/x-y

aa-b-a+ba-b=a-a+b/a-b= b/a-b

aa-b-a+bb-a=-a/b-a-a+b/b-a= -2a+b/b-a

aa-b+a+b2a-2b=2a/2(a-b) + a+b/2(a-b) = 3a+b/2(a-b)

aa-b+ab(a-b)во 2 степени=a(a-b)+ab/(a-b)^2= a^2-ab+ab/(a-b)^2= a^2/(a-b)^2

aa-b-a-ba=a^2-a^2-2ab+b^2/a^2-ab= -2ab+b^2/a(a-b)= b(2a+b)/a(a-b)

  ^2  - это значит во второй степени