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21 () Mark this question Consider the quadratic function y = 2x3+4x - 3. What do we know about the graph of this quadratic equation,
21 () Mark this question Consider the quadratic function y = 2x3+4x - 3. What do we know about the graph of this quadratic equation, based on its formula? O The vertex is (-1,-5) and it opens upward. O The vertex is (1,3) and it opens upward. O The vertex is (1,3) and it opens downward. O The vertex is (-1,-5) and it opens downward
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