Three real numbers $a,b,$ and $c$ satisfy the equations $a+b+c=2$, $ab+ac+bc=-7$ and $abc=-14$.  What is the largest of the three numbers?  Express your answer in simplest radical form.
Question:
Three real numbers $a,b,$ and $c$ satisfy the equations $a+b+c=2$, $ab+ac+bc=-7$ and $abc=-14$.  What is the largest of the three numbers?  Express your answer in simplest radical form.
Answer:
Let's think step by step.

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\sqrt{7}
Three real numbers $a,b,$ and $c$ satisfy the equations $a+b+c=2$, $ab+ac+bc=-7$ and $abc=-14$.  What is the largest of the three numbers?  Express your answer in simplest radical form.
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