If $\sqrt[3]{4x^2}=4$, find all possible values of $x$ and list them from least to greatest.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $\sqrt[3]{4x^2}=4$, find all possible values of $x$ and list them from least to greatest.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-4, 4
If $\sqrt[3]{4x^2}=4$, find all possible values of $x$ and list them from least to greatest.
train