SOLUTION: In which direction does the parabola for the quadratic equation y = -5x2 – 16x + 21 open?

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Question 700098: In which direction does the parabola for the quadratic equation y = -5x2 – 16x + 21 open?
Answer by reviewermath(1029) About Me  (Show Source):
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It opens downward because the coefficient of the x%5E2 term is negative.