# Math Help - Equation

If

find m^3+n^3

2. ## Re: Equation

Originally Posted by Mhmh96
If
find m^3+n^3
Let n=m
SQRT[11 + SQRT(120)] = 2SQRT(m)
11 + 2SQRT(30) = 4m
m = [11 + 2SQRT(30)] / 4

Wrap it up!

3. ## Re: Equation

If m and n are arbitrary real numbers, then $m^3+n^3$ is not a function of $\sqrt{m}+\sqrt{n}$.

For example, if $m = 11+\sqrt{120}=21.95$ and n = 0, then $m^3+n^3=10582.00$, but if m = 4.95 and n = 6.05, then $m^3+n^3=343.07$.