We just need a little algebra to make the symmetry more transparent ... The average of the two roots of the quadratic function is equal to the x-value of the axis of symmetry: $$ \frac{r_1+r_2}{2} = - ...

5\), write down the co-ordinates and nature of the turning point and the equation of the axis of symmetry. Since \(k = - 1\), then this parabola will have a maximum turning point at (-4 ...

5\), write down the co-ordinates and nature of the turning point and the equation of the axis of symmetry. Since \(k = - 1\), then this parabola will have a maximum turning point at (-4 ...