Answer:
8
Step-by-step explanation:
[tex]\sqrt{x}=p[/tex] is looking for a positive or zero number p such that [tex]p \cdot p=x[/tex].
So here you have [tex]\sqrt{64}[/tex].
This is basically asking you can you think of a number such that when you multiply it to itself you get 64.
The answer is 8 because 8(8) is 64.
Here are some other perfect squares:
1
4
9
16
25
36
49
....so on.
All of these have nice square roots or principal roots.
The principal roots of those numbers I just mentioned and the reason next is:
1 because 1(1)=1.
2 because 2(2)=4.
3 because 3(3)=9.
4 because 4(4)=16.
5 because 5(5)=25.
6 because 6(6)=36.
7 because 7(7)=49.
