# Mathematics for Chemistry/Functions

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## Functions as tools in chemistry[edit | edit source]

### The quadratic formula[edit | edit source]

In order to find the solutions to the general form of a quadratic equation,

there is a formula

(Notice the line over the square root has the same *priority* as a bracket. Of course we all know by now that is not equal to but errors of priority are among the most common algebra errors in practice).

There is a formula for a cubic equation but it is rather complicated and unlikely to be required for undergraduate-level study of chemistry. Cubic and higher equations occur often in chemistry, but if they do not factorise they are usually solved by computer.

Solve:

Notice the *scope* or *range* of the bracket.

Notice here that the variable is a *concentration,* not the ubiquitous .