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To integrate e^(2x), integration by substitution can be used.

2x=u, you're left with an intergrand of e^u. 

S: = integral sign

S: e^u dx. In this case we are still integrating the int...

Common exam question: fully expand and simplify (x+3)(x-2)

Student asks: how should I best answer the question? How do I do it step by step?

My answer:
First expand each individual par...

In short, a radian is an angular measurement, very much like a degree, except one radian is a lot bigger than one degree, and it has some special properties. A radian can often seem like ...

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Two straight lines can intersect at only one point. To identify the point at which the lines cross, we make a simultaneous equation, and solve x and y from here, by firstly writing one equation on top of ...