Simplifying this radical Sorry this is probably extremely easy but how do you simply the following radical?
$$\sqrt[3]{(x+y)^4}$$
Is it just $(x+y)\sqrt[3]{x+y}$?

$$\sqrt[3]{(x+y)^4}$$
Break $(x+y)^4$ into terms $(x+y)^3(x+y)$
$$=\sqrt[3]{(x+y)^3(x+y)}$$
$$=\sqrt[3]{(x+y)^3}\cdot\sqrt[3]{(x+y)}$$
$$=(x+y)\sqrt[3]{(x+y)}\;\;\;\;\;\;\;\;\;\;\;\;\{\because \sqrt[3]{a^3}=a\}$$
