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The first step to solving any equation is to work out what kind of equation it is. As this particular equation has only x's and numbers, and it has a x2 term, we know that it is quadratic.Now t...
[A] 2x + y = 18[B] x - y = 6Rearrange [A] to make y the subject 2x + y = 18minus 2x| y = 18 - 2xReplace the value y in [B] with the rear...
If we forget about the £150 more for a second then we can think of some very basic scenarios where the 5 : 2 ratio is satisfied. For example, Jon has £5 Nik has £2 or Jon has £10 Nik has £4 and so on. Fro...
Given the problem f(x)=(y+x)^5 we use the chain rule as a tool to find the derivative. However, it is difficult to use effectively in further problems without understanding the mechanics of the function. ...
y = 2x cos(3x) + (3x2-4) sin(3x)dy/dx = (2x x -sin(3x) x 3) + (2 x cos(3x)) + (6x sin(3x)) + ((3x2-4) cos(3x) x 3)dy/dx = -6x sin(3x) + 2 cos (3x) + 6x sin(3x)...
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