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# Help ASAP

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Let $$f$$ be defined by $$f(x) = \left\{ \begin{array}{cl} 3-x & \text{ if } x \leq 3, \\ -x^3+2x^2+3x & \text{ if } x>3. \end{array} \right.$$ . Calculate $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}$$ .

Im not quite sure how to do this problem.

Dec 15, 2019