Question

Find the square root of 81: 81
9
40.5
-9
9, -9

Answer 1

The square root of 81 is 9. However, it's important to note that both 9 and -9 are square roots of 81, since (-9) × (-9) also equals 81.

So, the correct answers from your options would be:
- 9
- -9
- 9, -9 (which includes both results)

If you're looking for the principal (non-negative) square root, the answer is 9.