Find the square root of 21

We need to find the square root of 21

Solution

We know that 21 can be expressed as 3 X 7

Hence, √21= √(3 X 7)

√21= √3 X √7

We know that √3 = 1.7320 and √7 =2.6457

√21= 1.7320 X 2.6457

√21= 4.5823524

Answer

√21= 4.5823524