Calculate the value of square root without calculator Technique of:

Calculate the value of square root without calculator
Technique of:
.
Formula: √x = √s + (x-s) ÷ (2 × √s)
Here,
x = The square root of that number will be.
s = x squared near a square root
Number of values.
Example:
√ 12 = 3 + (12 - 9) ÷ (2 × 3)
= 3 + 3 ÷6
= 3 + 5
= 3 • 5
B: DR: square root around √12
Numbers num √ 9 = 3 or √16 = 4
It can be resolved.
Example:
√7 = 8 + (72-64) ÷ (2 × 8)
= 8 + 8 ÷16
= 8 + • 5
= 8 • 5
Example:
√5 = 2 + (5-4) ÷ (2 × 2)
= 2 + 1 ÷ 4
= 2 + • 25
= 2 • 25