HI,
I need help with this one (x^1/2 - y^1/2)^5.
just need to know where to start.
Thanks.
Go to the formula. Wherever you see an $\displaystyle x$, replace it by $\displaystyle (x^{1/2})$. Wherever you see a $\displaystyle y$, replace it by $\displaystyle (-y^{1/2})$.
Example: $\displaystyle x^k$ becomes $\displaystyle (x^{1/2})^k$