Notice that the closest perfect squares to the square root of 72 are 64 and 81. Let's express it.
[tex]64<\sqrt[]{72}<81[/tex]
So, if we take the square root of each number, we have.
[tex]8<\sqrt[]{72}<9[/tex]
This means the square root of 72 is between 8 and 9. The image below shows a number line with the number.s
