help

flew62999

New member
Joined
Aug 30, 2005
Messages
47
Simplify:

x^-1 - y^-1
----------------
x^-1 + y^-1


wouldnt these just cancel each other out?
 
Wouldn't what "just cancel out"? You have:

. . . . .(x<sup>-1</sup> - y<sup>-1</sup>)/(x<sup>-1</sup> + y<sup>-1</sup>)

. . . . .[(1/x) - (1/y)] / [(1/x) + (1/y)]

Since the contents of the brackets don't match, their expressions can't "cancel".

Eliz.
 
Top