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To work out the number of roots a qudratic ax²​+bx+c=0 you need to compute the discriminant (b²​-4ac).

If the discrimant is less than 0, then the quadratic has no re...

The main methods of differentiation you need to know at A level are the chain rule, the product rule and the quotient rule.

The chain rule should be used when the eqation is a function of...

An integral is the area that lies below a graphed line and the x-axis, an indefinite integral is when an interval is not used, and so is often infinite, as it covers the entire area under a graph, and not...

A parametric equation is one that is defined in terms of a single parameter, usually called t.
This means that, instead of the standard geometric equation, where y and x are defined by each other, e....

A complex number is one that is made up of a complex and real part, they can all be written as:
a+bi, where a and b are real numbers.
The thing that makes the number "complex" is "...