Question

решите плз в.......

Answer 1

1) 6x^3y^3/15xy^3=2x^2/5
2) 2b+18/b^2+18b+91=2(b+9)/(b+9)^2=2/b+9
3) y^2-2y+1/1-y^2=-(y-1)^2/(y-1)(y+1)=-1/y+1

Answer 2

а)6х^2
______
15у

б)2
______
2b+81