Everyone learns (and some readers maybe still remember) the quadratic ... the formula. A Carnegie Mellon mathematician named Po-Shen Loh didn’t expect to find a new way to derive the solution ...

The quadratic formula for a ... It is not possible to find the square root of a negative number, so the equation has no real solutions. The graph of \(y = x^2 + 2x + 5\) does not cross or touch ...

If a quadratic equation can be factorised, the factors can be used to find the roots of the equation. The equation factorises to give \((x + 3) (x - 2) = 0 \) so the solutions to the equation \(x ...