Quadratic equations and inequalities

By the end you’ll be able to

• Solve quadratic equations by factorising, including $ax^2 + bx + c = 0$ with $a \ne 1$
• Solve quadratics using the quadratic formula, giving answers to a stated accuracy or in exact surd form
• Complete the square, $x^2 + bx + c = (x + p)^2 + q$, and use it to solve equations and find the turning point of a quadratic graph (Higher)