Why is the square root of the square of a negative number /variable always positive?
133496
is $\sqrt{x}$ always positive?
54030
Square and square root and negative numbers
60261
Is $\sqrt{x^2}=|x|$ or $=x$? Isn't $(x^2)^\frac12=x?$
111266
Function that returns $0$ for all negative values
9115
Why does C++ output negative numbers when using modulo?
71566
Positive and negative complex numbers?
28228
Is a prime factor of a number always less than its square root?
155635
Why is the math for negative exponents so?
23128
Why aren't logarithms defined for negative $x$?
103987
What does the square root of minus $i$ equal?
84315
Why can't polynomials have negative exponents or division by a variable
64741
The square root of positive definite matrix
19
Why is the square root of a sum not equal to the square root of each its addends?
111432
Square root of a number squared is equal to the absolute value of that number
6402
What does negative R-squared mean?
75690
Does the given matrix have a square root?
150624
Why does the square root of a square involve the plus-minus sign?