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Firstly if you multiply the number infront of the x² by the number at the end to give -12. And then take the number infront of x, which is -1. Now we need to find two numbers that add to make -...

The best way to revise Maths is by completing questions by topic then once confident, moving on to past papers.

A hypothesis test can be thought of as being somewhat similar to a court case. In a court case, we want to find out whether someone is either guilty, or not guilty, so we assume that they are not guilty, ...

To solve this question you need to find a value of x and y which satisfies both of the equations. Simultaneous equations can be solved by three methods: substitution, elimination, and graphically. We will...

Let the lines be:

r₁ = (a, b, c) + t(d, e, f)

r₂ = (g, h, i) + s(j, k, l)

Since t and s above are variables and the rest of the letters are constants, the only w...