# Template:EquationRef/doc

The pair of templates {{EquationRef}} and {{EquationNote}} is used for labeling equations in text.

For example, **:{{EquationRef|Eq. 1}} <math>x^2+x+1=0\ </math>** results in:

Here, the identifier "**Eq. 1**" is a label which can be later referred to with a call to {{EquationNote}}. That is, **{{EquationNote|Eq. 1}}** produces a link **Eq. 1** to this equation.

Similarly, **:{{EquationRef|2|Eq. 2:}} <math>x^2-2x+1=0\ </math>** results in

which can be referred to by **{{EquationNote|2}}** or even **{{EquationNote|2|Equation 2}}** (i.e., **Equation 2**).

This template can be used together with {{NumBlk}} to produce nicely formatted numbered equations. For instance:

**{{NumBlk|::|<math>x^2+x+1=0\ </math>|{{EquationRef|3}}}}**gives

**(**)

- which may then be referred to by
**{{EquationNote|3}}**or even**{{EquationNote|3|Eq. 3}}**(i.e.,**Eq. 3**).

**{{NumBlk|::|<math>x^2+x+1=0\ </math>|{{EquationRef|4|Eq.4}}}} gives**

**(**)

- which may be referred to by
**{{EquationNote|4}}**(i.e.,**4**).

**{{NumBlk|::|<math>x^2+x+1=0\ </math>|{{EquationRef|Eq.5}}}}**gives

**(**)

- which may be referred to by
**{{EquationNote|Eq.5}}**(i.e.,**Eq.5**).