Question

Wich number is the principal square root of 49

A.7
B.-7
C. 7 -7
D. There is no principled square root

Answer 1

A principle square root of a real number that's not negative, such as 49, is the square root of that number that is not negative.

If you take the square root of 49, you get either -7 or 7, since both
`7^(2)` and
`(-7)^(2)` equal 49. However, the principle square root would be A) 7, since it's not negative.