Let $a,$ $b,$ $c$ be positive real numbers such that both
\[x^4 + ax^3 + bx^2 + cx + 1\]and
\[x^4 + 2ax^3 + 2bx^2 + 2cx + 1\]are both squares of polynomials.  Find $a + b + c.$
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<|im_start|>user
Let $a,$ $b,$ $c$ be positive real numbers such that both
\[x^4 + ax^3 + bx^2 + cx + 1\]and
\[x^4 + 2ax^3 + 2bx^2 + 2cx + 1\]are both squares of polynomials.  Find $a + b + c.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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user
7
Let $a,$ $b,$ $c$ be positive real numbers such that both
\[x^4 + ax^3 + bx^2 + cx + 1\]and
\[x^4 + 2ax^3 + 2bx^2 + 2cx + 1\]are both squares of polynomials.  Find $a + b + c.$
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