Some quadratics cannot be factorised. An alternative method to solve a quadratic equation is to complete the square. To solve an equation of the form \(x^2 + bx + c = 0\) consider the expression ...

Everyone learns (and some readers maybe still remember) the quadratic formula. It’s a pillar of ... That’s 3.48 (about) and the square root is about 1.866. The roots, then, are 1.5625±1. ...