Question

How is the following solved? Is there reciprocation?

`(a/b+c/d) divide (a/b-c/d)`

Answer 1

`(ad+bc)/(ad-bc)`

Explanation:

`"simplify each factor"`

`rArr(ad+bc)/(bd)" and "(ad-bc)/(bd)`

`"change "-:" to "xx" and invert second fraction"`

`rArr(ad+bc)/cancel(bd)xxcancel(bd)/(ad-bc)=(ad+bc)/(ad-bc)`