Let $a, b, c$ be real numbers with $a \ne 0$. If $\alpha$ is a root of $a^2x^2 + bx + c = 0$,$\beta$ is a root of $a^2x^2 - bx - c = 0$,and $0 < \alpha < \beta$,then the equation $a^2x^2 + 2bx + 2c = 0$ has a root $\gamma$ that always satisfies:

  • A
    $\gamma = \frac{\alpha + \beta}{2}$
  • B
    $\gamma = \alpha + \frac{\beta}{2}$
  • C
    $\gamma = \alpha$
  • D
    $\alpha < \gamma < \beta$

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