A few math questions. What is the basis for the mathematical reduction?

1) (2x²-2)/(x²-2x+1)= 2(x²-1)/(x²-2x+1)=2(x+1)(x-1)/(x-1)^2=2(x+1)/(x-1)

3a²-12a+12/4-a² =3(a^2-4a+4)/(4-a^2)=3(a-2)^2/(2-a)(2+a) =3(2-a)/(2+a)

2) x²+y²-2x-6y+10=0

It is easy to know that the above equation is only true if: x=1, y=3.

2xy-y²-x²/y²-x²＝(2*1*3-9-1)/(9-1)=-1/2

Divide 10 into 1 and 9 to make two perfect flat methods, you can find x=1 y=3, and then substitute the evaluation.

2x²-2/x²-2x+1

2(x2-1)/(x-1)2

2(x-1)(x+1)/(x-1)2

2(x+1)/(x-1)

3a²-12a+12/4-a²

3(a2-4a+4)/(2-a)(2+a)3(a-2)2/(2-a)(2+a)

3(a-2)/(a+2)

If x +y -2x-6y+10=0 find the fraction 2xy-y -x y -x

x2-2x+1+y2-6y+9=0

x-1)2+(y-3)2=0

x=1 y=3

2xy-y²-x²/y²-x²

2xy+y2+x2)/(y-x)(y+x)-(x+y)2/(y-x)(y+x)

x+y)/(y-x)

I don't need to go into details, it's very simple.

34/51 = 2/3

38/95 = 2/5

39/52 = 3/4

30/42 = 5/7

64/120 = 8/15

77/210 = 11/30

54/72 = 3/4

35/49 = 5/7

66/110 = 3/5

81/180 = 9/20

2/4 = 1/2

3/9 = 1/3

15/25 = 3/5

85/100 = 3/4

The bureau was a bit of an accident day when he said well.

Haha, vv feels like you don't eat, v, no, there are hundreds of people in the photo studio.

You're amazing, you're a math genius