Find the square root of 81: √81
1. 9
2. 40.5
3. -9
4. 9, -9
The square root of 81 is 9.
To find the square root of 81, you can follow these steps:
Step 1: Start with the number 81.
Step 2: Look for the factors of 81. In this case, 9 is a factor of 81 because 9 x 9 = 81.
Step 3: Determine the positive and negative square roots. Since the question asks for the square root (not specifically the positive square root), both the positive and negative square roots are valid answers.
So, the square root of 81 is both 9 and -9. Therefore, the correct answer is option 4: 9, -9.
To find the square root of 81 (√81), you can follow these steps:
Step 1: Start by identifying the perfect square factors of 81.
- In this case, 81 is a perfect square because it can be written as 9 * 9.
Step 2: Take the square root of the perfect square factors.
- The square root of 9 is 3.
- Therefore, the square root of 81 is 9.
So, the correct answer is 9 (option 1).