Answer:using division method
Explanation:
Example is the square root of 144
144 divided by the less prime number till 144 can not be divided again
144÷2=72
72÷2=36
36÷2=18
18÷2=9
9÷3=3
3÷3=1
Then you group the prime numbers used
(2×2)×(2×2)×(3×3)
Then take one of the prime numbers form each group
2×2×3=12