Differs from `polynom::as.character.polynomial()`

in that trailing zeros
are preserved.

## Usage

```
poly2character(
x,
decreasing = getOption("ggpmisc.decreasing.poly.eq", FALSE),
digits = 3,
keep.zeros = TRUE
)
```

## Arguments

- x
a

`polynomial`

object.- decreasing
logical It specifies the order of the terms; in increasing (default) or decreasing powers.

- digits
integer Giving the number of significant digits to use for printing.

- keep.zeros
logical It indicates if zeros are to be retained in the formatted coefficients.