Question

find the square roots of the following numbers by prime factorisation method
400​

Answer 1

Answer:

Prime numbers are the numbers that have only two factors. One factor is 1 and the other is the number itself. Multiplying these numbers together, we get 20. Hence, 20 is the square root of 400.

Answer 2

Answer:

Step-by-step explanation:

Solution :

Resolving the given number

400 into prime factors, we get

400 2×2×2×2×5×5

= (2x2)x(2×2)×(5×5)

Therefore,

Square root of 400

= √400

= √(2×2)×(2×2)×(5×5)

= 2 × 2 × 5

= 20