x/2 = 3/y. Can anyone explain why this is an hyperbola?(adsbygoogle = window.adsbygoogle || []).push({});

find the third term of the expansion (2x-y)to the third power.

I know u have to do the things with the combinations but all i get is 20xy² but the answer is 6xy². Can anyone help?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Short questions

**Physics Forums | Science Articles, Homework Help, Discussion**