Show an equality is true

1. Dec 22, 2005

joex444

How could I show that this is true:
$$\frac{m^2g^2-m^2}{ma+za}-\frac{zamg}{am+az+gm+gz}=-\frac{zma^2-z^2a^2}{ma-mg}$$

2. Dec 22, 2005

Tide

What have you tried?

3. Dec 23, 2005

Staff: Mentor

Where does that expression come from? It doesn't look true to me. (Plug in a few values and see for yourself.)

4. Dec 24, 2005

joex444

yeah, it's not true...well, that makes it easy to show it's not true.