Tonight my friend came to me with some simple math problems. Most of them were easy, but some of them I could not do, or could not remember how to do. It is very frustrating because I should know how to do this since I did it years ago.(adsbygoogle = window.adsbygoogle || []).push({});

I was wondering if you guys could help. The two problems I cant get are:

1) [tex] xy{\sqrt{125x^3y^5}} - {\sqrt{12x^5y^7}} + x^2y^3{\sqrt{{80xy}} [/tex]

2) [tex] {\sqrt[3]{16x^4y^3}} - 5x{\sqrt[3]{54xy^3}}} + 20y{\sqrt[3]{2x^4}} [/tex]

It seems so easy, jjust adding and subtracting, but I don't remember how to do this type of stuff.

Thanks in advance guys.

**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!

# Simple math problems

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