Question

How do you find the difference in `(4y)/(xy) - (2x)/(xy^3)`?

Answer 1

`(4y^3-2x)/(xy^3)`

Explanation:

We need a common denominator:

`(4y)/(xy)-(2x)/(xy^3)`

`(4y)/(xy)(1)-(2x)/(xy^3)`

`(4y)/(xy)(y^2/y^2)-(2x)/(xy^3)`

`(4y^3)/(xy^3)-(2x)/(xy^3)`

`(4y^3-2x)/(xy^3)`