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As this is a 4 mark question you are expected to make 4 points; 1 for each mark This question is asking you to describe differences. You do not need to explain why there ...

x² + x - 12 = 0/ x² + 4x - 3x - 12 = 0 (split x into two numbers which multiply to equal -12)/ x(x + 4) - 3(x + 4) = 0 (take out x and 3 respectively)/ (x + 4)(x - 3) = 0 (collect te...

An ion can be an atom or a group of atoms that are charged. This means they can be positively charged or negatively charged.A positive ion is formed when the atom loses electrons. Because electrons have a...

First we need to find the complementary function - the solutions of y'' -3y' + 2y = 0. By setting y=Ae^(kx) (A is a constant) we get :A(k^2 - 3k + 2)y = 0. This means k^2 - 3k + 2 = 0 =(k-1)(k-2). If 2 th...

The working memory model (WMM) was put forward by Baddeley and Hitch. The model consists of 4 main features; central executive, phonological loop, visual-spatial sketchpa...