If $f(x) = \begin{cases} x^2-1, & 0 < x < 2 \\ 2x+3, & 2 \leq x < 3 \end{cases}$,the quadratic equation whose roots are $\lim_{x \rightarrow 2^{-}} f(x)$ and $\lim_{x \rightarrow 2^{+}} f(x)$ is

  • A
    $x^2-14x+49=0$
  • B
    $x^2-10x+21=0$
  • C
    $x^2-6x+9=0$
  • D
    $x^2-7x+8=0$

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