Find the square root of 1225?

Answer: √1225 = 35

1225 can be written as

1225 = 5 × 5 × 7 × 7

1225 = 5² × 7²

Take the sqaure root on both the side we get

√1225 = √ 5² × 7²

√1225 = 5 × 7

√1225 = 35