## Explanation

The AND function is designed to evaluate multiple logical expressions, and returns TRUE only when all expressions are TRUE.

In this case the we simply compare one range with another with a single logical expression:

```
B5:D12=F5:H12
```

The two ranges, B5:B12 and F5:H12 are the same dimensions, 5 rows x 3 columns, each containing 15 cells. The result of this operation is an array of 15 TRUE FALSE values of the same dimensions:

{TRUE,TRUE,TRUE;

TRUE,TRUE,TRUE;

TRUE,TRUE,TRUE;

TRUE,TRUE,TRUE;

TRUE,TRUE,TRUE;

TRUE,TRUE,TRUE;

TRUE,TRUE,TRUE;

TRUE,TRUE,TRUE}

Each TRUE FALSE value is the result of comparing corresponding cells in the two arrays.

The AND function returns TRUE only if all values in the array are TRUE. In all other cases, AND will return FALSE.

### Case-sensitive option

The formula above is not case-sensitive. To compare two ranges in a case-sensitive manner, you can use a formula like this:

```
{=AND(EXACT(range1,range2))}
```

Here, the EXACT function is used to make sure the test is case-sensitive. Like the formula above, this is an array formula and must be entered with control + shift + enter.