SOLUTION: jacob discovered that the x intercepts of a certain parabola are (3,0) and a(-1,0), but now he needs to find the vertex. can you get him started? what do you know about the verte

Question 306129: jacob discovered that the x intercepts of a certain parabola are (3,0) and a(-1,0), but now he needs to find the vertex. can you get him started? what do you know about the vertex? draw a sketch of this parabola to help you
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Jacob discovered that the x intercepts of a certain parabola are (3,0) and
(-1,0), but now he needs to find the vertex. can you get him started? what do you know about the vertex? draw a sketch of this parabola to help you
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The vertex is half-way between -1 and 3, so the x-value is 1.
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The y-value is either positive (opens down) or negative (opens up).
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The form of the equation is y = k(x-3)(x+1)
You'll have to draw the sketch.
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Cheers,
Stan H.
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