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The graph of a certain quadratic y = ax^2 + bx + c is a parabola with vertex (-4,0) which passes through the point (1,-75). What is the value of a?

 Apr 15, 2020
 #1
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1 - (- 4) = 5

52 = 25

- 75 : 25 = - 3

a = - 3

laugh

 Apr 15, 2020

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