Quadratic Equations and Inequalities
Scan note 1) Solving quadratic equations means finding the roots of equation (the value of x) 2) Methods of solving quadratic equations: (a) Factorisation. (b) Completing the square. (c) Quadratic formula. ____________________________________________ Before proceeding with this section we should note that the topic of solving quadratic equations will be covered in two sections. This is done for the benefit of those viewing the material on the web. This is a long topic and to keep page load times down to a minimum the material was split into two sections. First Method : (a) Factorisation Before proceeding ,we should note the standard form of a quadratic equation. ax² + bx + c = 0 , a ≠ 0 The only requirement here is that we have an x² in this equation.We guarantee that this term will be present in the equation by requiring a ≠0. Note however,it is okay if b and / or c are 0. •a / b / c can even be in a negative form ; ...