Respuesta :

wegnerkolmp2741o

7            ?

----     =  ------

20 y     40 y^3



to get the denominators to match we need to multiply by 2y^2

what we do to the bottom we do to the top

7*2 y^2

14y^2

7            14y^2

----     =  ------

20 y     40 y^3