"Note that any positive real number has two square roots, one positive and one negative. For example, the square roots of 9 are -3 and +3, since (-3)2 = (+3)2 = 9. Any nonnegative real number x has a unique nonnegative square root r; this is called the principal square root .
In respect to this, why is 9 The square root of 81?
Explanation: 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 .
What is the square root of 1 by 4?
For example, in the integers, the square root of -1/4 is i/2.
What is 9 The square root of?
Every nonnegative real number x has a unique nonnegative square root, called the principal square root, which is denoted by √x, where the symbol √ is called the radical sign or radix. For example, the principal square root of 9 is 3, which is denoted by √9 = 3, because 32 = 3 ⋅ 3 = 9 and 3 is nonnegative.
What are 2 square roots of 64?
Most numbers have two square roots, one positive, one negative. -8 times -8 is also 64. So -8 is also a square root for 64.