rasensprenger, 4 months ago The square root of x is usually defined as the positive real number that squares to x, so x^2 = 4 => x = ±2 but sqrt(4) = 2, not ±2 The complex sqrt function is multivalued, but that opens a whole other can of worms
The square root of x is usually defined as the positive real number that squares to x, so x^2 = 4 => x = ±2 but sqrt(4) = 2, not ±2
The complex sqrt function is multivalued, but that opens a whole other can of worms