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The parabola y=ax^2+bx+c is graphed below. Find a+b+c. (The grid lines are one unit apart.)

 

 May 19, 2021
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see the previous problem; The answer should be \(y={(x-1)}^{2}-4,\ in\ the\ vertex\ form,\ and\)\(y={x}^{2}-2x-3,\ in\ the\ standard\ form.\)

 May 20, 2021

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