The words contained in this file might help you see if this file matches what you are looking for:

...Quadratic inequalities prerequisites you should be familiar both with linear and polynomials able to find the factors of a from ax bx c sketch corresponding polynomial y by identifying its roots example x graph solution are therefore crosses axis at these points it is also directed upwards since coefficient in positive blacksacademy net solving that involve an expression for inequality one way such sketching using identify range values satisfies solve which we sketched lies above when or hence dealing fractions suppose required difficulty here how deal comprises denominator fraction explain why following argument wrong rule manipulation multiplying sides negative number then sign must reversed but can do not know whether change there two methods this type method square any always if multiply will remove unaffected point need factorise use formula...