::: {.cell hash='02_R_introduction_cache/pdf/unnamed-chunk-27_04d694306d9cce163900c9bdfbf89c3e'}

```{.r .cell-code}
sqrt(2)^2 - 2
```

::: {.cell-output .cell-output-stdout}
```
[1] 4.440892e-16
```
:::
:::