You can try vertex form, or the axis of symmetry, or even calculus. There is a structure to the roots of every polynomial, and mathematicians study these structures and look for opportunities to ...

The coordinates of the turning point and the equation of the line of symmetry can ... cross the \(y\)-axis at (0, -3) Writing \(y = x^2 – 2x – 3\) in completed square form gives \(y = (x ...