Помогите представить в виде дроби:

1)y/y^2-9 - 3/9-y^2 =

2)2x/x^2-4 - 4/4 - x^2 =

3)x2/x-7 + 7x/7-x =

4)7/x^2-9x + 3x-7/x^2-9x =

5)5y-19/11y + 6y+8/11y =

6)y+3/y-3 - 9-y/y-3 =

7)12a+b/28a - b-30a/28a =

8)6a-4/2 - 2-3a/2 =

9)b/a-b - a/a-b =

10)5a/a-b - 5b/a-b =

11)m^2/m-5 - 25/m-5 =

12)a^2-47/a+7 - 2/a+7 =

13)m/m^2-n^2 - n/m^2-n^2 =

14)m2/m+n - n^2/m+n =

15)n^2/3n+3m - m^2/3n+3m =

 

И простро уравнения решить:

1)2x+2y/m+5 * m-25/6x+6y =

2)m+5/m-5 * m^2-25/2m+10 =

3)m-5/x^2-y^2 * 8x-8y/3m-15 =

4)m^2-25/2y+2b / y^2-b^2/2m-10 =

5)3x/x^2+4x * a^2-b^2/3a-3b =

6)m-5/m^2-25 * 2m+10/3m-15 =

7)x^2-16/8x^2 * 4x/x+4 =

8)5-y/y * 7y/y^2-25 =

9)(c+2)^2/2c-6 * c^2-9/5c+10 =

10)m+2/3-3a / m^2-4/5a-5 =

11)x^2-1/12x^2 * 3x/x+1 =

12)2-y/y * 11y^2/y^2-4 =

13)2x-4y/c+3 * 5c+15/x^2-4y^2 =

14)a/y-x * x-y/b =

15)m/x^2-2x * 2x-4/n =

16)1+2a+a^2/n * m/4a+4 =

17)3a+3/1-2a+a^2 * 4a-4/1+2a+a^2 =

18)(a-1)^2/1-a^2 * 5+5a/7 =

19)a-b/xy^6 / b-a/xy^2 =

20)m+2/m+3 / 5m+10/9-m^2 =

21)x^2-4/9-m^2 / x-2/3+m =

22)m^2-n^2/7 * 14/m-n * m/(n+m)^2 =

23)(m-m^2/m+1) *m^2-1/m^2+2m =

24)(2+m/m+1) * 3m^2+3m/12m+8 =

25)4+b/4-b * (2b^2/4+b - b) =

26)(y/y-5 - 2y) / 11-2y/y-5 =

27)m-4/7 * 14/m^2 - n^2 * (m+n)^2/m =

28)x^2-4/9-m^2 / x-2/3+m - 2/3-m =

29)1/x-y * y^2-x^2/x+y =

1)y/y^2-9 - 3/9-y^2 = y /y^2-9 - (-3/y^2-9) = y /y^2-9 + 3/y^2-9 = y+3/(y-3)(y+3)= 1/y-3

2)2x/x^2-4 - 4/4 - x^2 =2x/x^2-4 - (-4/x^2-4) = 2x+4/x^2-4 = 2(x+2)/(x-2)(x+2)= 2/x-2

3)x2/x-7 + 7x/7-x = x^2/x-7 - 7x/x-7 = x^2-7x/x-7 = x(x-7)/x-7= x

4)7/x^2-9x + 3x-7/x^2-9x =7+3x-7/x^2-9x= 3x/x^2-9x

5)5y-19/11y + 6y+8/11y =5y-19+6y+8/11y= 11y - 27/11y

6)y+3/y-3 - 9-y/y-3 =y+3-9-y/y-3=-3/y-3

7)12a+b/28a - b-30a/28a =12a+b-b-30a/28a = -28a/28a = -1

8)6a-4/2 - 2-3a/2 =6a-4-2-3a/2 = 3a+6/2 = 3(a+2)/2

9)b/a-b - a/a-b =-a/a-b - b/a-b = -(a-b)/a-b = -1

10)5a/a-b - 5b/a-b =5a-5b/a-b = 5(a-b)/a-b = 5

11)m^2/m-5 - 25/m-5 =m^2-25/m-5 = (m-5)(m+5)/m-5= m+5

12)a^2-47/a+7 - 2/a+7 =a^2-47-2/a+7 = a^2-49/a+7 = (a-7)(a+7)/a+7=a-7

13)m/m^2-n^2 - n/m^2-n^2 =m-n/m^2-n^2= m-n/(m-n)(m+n)=1/m+n

14)m2/m+n - n^2/m+n =m^2-n^2/m+n = (m-n)(m+n)/m+n = m-n

15)n^2/3n+3m - m^2/3n+3m =n^2-m^2/3n+3m = (n-m)(n+m)/3(n+m) = n-m/3