Question

Can someone please provide an example problem showing multiplying and dividing rational expressions? I'm trying to get ready for a DBA tomorrow. Thank you!

Answer 1

Explanation:

To multiply rational expressions, simply multiply the numerators together (the tops) and the denominators together (the bottoms).

For example:

`(x+a)/(y+b)*(x+c)/(y+d)`

`= ((x+a)(x+c))/((y+b)(y+d))`

`=(x^(2)+ax+cx+ac)/(y^(2)+by+dy+bd)`

To divide by a rational expression, multiply by its reciprocal. In other words, flip the fraction, then multiply.

For example:

`(x+a)/(y+b)/(x+c)/(y+d)`

`=(x+a)/(y+b)*(y+d)/(x+c)`

`=((x+a)(y+d))/((x+c)(y+b))`

`=(xy+dx+ay+ad)/(xy+bx+cy+bc)`

Answer 2

I hope this helps... good luck