Simplify the expression 3² + 4²Determine the square root √81

To simplify the expression (3^2 + 4^2):

1. Calculate (3^2):

[

3^2 = 9

]
2. Calculate (4^2):

[

4^2 = 16

]
3. Add the results together:

[

9 + 16 = 25

]

So, (3^2 + 4^2 = 25).

Next, to determine the square root of (81):
1. Find (sqrt{81}):

[

sqrt{81} = 9

]

In summary:

– The simplified expression is (25).

– The square root of (81) is (9).

If you have more questions or need further clarification, feel free to ask!