YouTube on MSNOpinion

How to write the equation of a parabola given vertex and directrix

Learn how to write the equation of a parabola given the vertex and the directrix. A parabola is the shape of the graph of a ...
YouTube on MSNOpinion

How to write the standard equation of a parabola given the focus and vertex

Learn how to write the equation of a parabola given a point on the parabola. A parabola is the shape of the graph of a ...
BBC

Solving a quadratic equation

Look at the National 4 factorising section before continuing. When a question asks you to 'solve' a quadratic equation, this means that you are to find the roots of the quadratic. In other words, ...
The New York Times

This Professor’s ‘Amazing’ Trick Makes Quadratic Equations Easier

Looking for the answers to ax² + bx + c = 0? A mathematician has rediscovered a technique that the ancient Babylonians used. By Kenneth Chang and Jonathan Corum The quadratic equation has frustrated ...
BBC

Solving a quadratic equation

When asked to solve a quadratic equation, we are really finding the roots – where the parabola cuts the x-axis, therefore when we have the graph drawn, it is very easy to do this. Looking at the graph ...