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1. The graph of the equation y=ax^2 + bx + c, where a, b, and c are constants, is a parabola with axis of symmetry x = -3. Find b/a

 

2. The vertex of a parabola is at (12, -4), and its axis of symmetry is vertical. One of the x-intercepts is at (15, 0). What is the x-coordinate of the other x-intercept? 

 Feb 27, 2021
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1      Axis of symmetry will be the x value of the vertex  given by    -b/2a  = -3               then b/a = -3* -2 = 6

 

2     the other intercept will be the same distance from the vertex except on THE OTHER SIDE OF THE VERTEX  

                              9,0       12 - 4       15, 0

 Feb 27, 2021

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