Quadratic Equations

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How can you determine the roots of a quadratic equation using the quadratic formula?

The roots can be found using the formula $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$.

What is a parabola?

A parabola is the graph of a quadratic function, shaped like a U or an inverted U, depending on the sign of $a$.

What is the axis of symmetry for a quadratic equation?

The axis of symmetry is the vertical line $x = -\frac{b}{2a}$, which divides the parabola into two mirror-image halves.

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