[tex]\sqrt{225}=15 \\
Uite~inca~niste~puteri~simplu~de~retinut~si~folosite~mai~frecvent: \\
10^2=100 \\
11^2=121 \\
12^2=144 \\
13^2=169 \\
14^2=196 \\
16^2=256 \\
17^2=289 \\
18^2=324 \\
19^2=361 \\
20^2=400[/tex]
[tex]225|5 \\
~~45|5 \\
~~~9|3^2 \\
~~~1|1 \\ \\
\sqrt{225}= \sqrt{5^2*3^2}=5*3=15 [/tex]
