Question

Find the square root of 81​

Answer 1

Step-by-step explanation:

the square root of √81=9 .

Answer 2

81=9⋅9 Then, the square root of √81=9 . Because the double multiplication for the same sign is always positive, the square root is also valid with the other sign 81=(−9)⋅(−9) then √81=−9 and we can say that √81=±9.

Hope it helps......