# Math Help - Simplify the following complex rational expressions

1. ## Simplify the following complex rational expressions

1) $\frac {1/x-1/y}{1/x+1/y}$

Attempt:

$\frac{y-x}{y+x}$

Can we cancell the y since both are positive

$\frac {-x}{+x}$

Is this correct please write in steps if not

Thank you .. .

2. Originally Posted by mj.alawami
1) $\frac {1/x-1/y}{1/x+1/y}$

Attempt:

$\frac{y-x}{y+x}$

stop here ... the manipulation you did below is incorrect. you cannot cancel the "y's".

Can we cancell the y since both are positive

$\frac {-x}{+x}$

Is this correct please write in steps if not

Thank you .. .
ok?

3. Originally Posted by skeeter
ok?
ok !!! Thank aloot for the help appreciate it ...