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There are many different ways of approaching extract questions and some will work better for some more than others. However, there are steps that you can follow which will help to ensure that all the AO`s ar...

Complete the square:x 2 +4x gives (x+2) 2 -4y 2 +2y gives (y+1) 2 -1Therefore,(x+2) 2 -4+(y+1) 2 -1=20Rearranging gives:(x+2) 2 +(y+1) 2 =25Comparing to the standard equation for a circle:(x-a) 2 +(y-b) 2 =r...

The question is asking for the range of x values that satisfies the inequality. First rearrange the equation to form a quadratic: x 2 – x – 6 < 0. Factorise the quadratic to find x-intercepts: ( x – 3 )( ...

Region which a force acts on a charged particle and the force is same at all points.

We will set the answer layout first by forming 2 brackets. (x+a)(x+b)=0We then look at the signs used, particularly negative signs. In this question, there is a minus sign before the 4.This means that one of...