Imaginary Numbers Square Root Example. The square root of minus one 1 is the unit imaginary number the equivalent of 1 for real numbers. For example if x 7 is one root of the polynomial this root is considered both real and complex because it can be rewritten as x 7 0i the imaginary part is 0.
For example the square root of 4 is 2i. The square root of a number is a value that when multiplied by itself equals the original number. In other words imaginary numbers are defined as the square root of the negative numbers where it does not have a definite value.
Let s try to find the square roots of 3 4i.
Examples of imaginary numbers. Real numbers have no imaginary part and pure imaginary numbers have no real part. The square root of a negative number results in an imaginary number noted by the letter i. But in electronics they use j because i already means current and the next letter after i is j.