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To find the highest common factor of 24 and 90 we do this in three steps:
1. Find the prime factorisation of the two numbers. This means rewrite each given number as a product of onl...

Integration by parts is used to integrate a product of functions. The formula is as follows:

Int[f(x)g'(x)] = f(x)g(x) - Int [f'(x)g(x)]

All quadratic equations take the general form:

ax²+bx+c=0

The first step used to comlete the square is to divide the whole equat...

First, you have to work out whether the side you need to find is the hypotenuse or not. The hypotenuse is the longest side of the triangle, opposite the right angle. For this question, you use Pythagoras'...

Sometimes you are asked to solve simultaneous equations where one of the equations has an x² and/or a y² in it - this is called a non-linear equation. This kind of question can lo...