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Firstly and most importantly, I would recommend reading the question carefully, making sure you understand it. If there is a passage that comes alongside it, do give yourself time to read carefully and se...

dy/dx = 4/(x^2+5) - 4x(2x)/(x^2+5)dy/dx= 4(5-x^2)/(x^2+5)^2Part B4(5-x^2)/(x^2+5)^2<05-x^2<05<x^2

I have not had a lot of free time recently because I must revise for my exams. However, I like to exercise to improve my health. At home, when I am not working, I use my computer in order to download musi...

First we need to use the factor theorem to find a factor.f(1)=-25 so x-1 is not a factorf(-1)=9 so x+1 is not a factorf(2)=0 so x-2 is a factorSo x-2 is our starting point, we need to polynomial division ...

To solve these equations you first want to eliminate the same variable from each equation. In this question it is easiest to eliminate Y, to do this we will times equation 1 by 3 to get 21X-18Y=114 and eq...