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OpenStudy (anonymous):
Choose all of the following equations that have a graph in which the parabola opens downward. More than one answer may be chosen. y = 2x2 + 2x + 8 y = −4x2 + 8x − 19 y = 16x2 + 2x − 4 y = −x2 − 6x + 10
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OpenStudy (anonymous):
a negative x^2 coefficient will do that for you...
OpenStudy (anonymous):
What?
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