# Why is the square root of negative one an imaginary number?

## Why is the square root of negative one an imaginary number?

Here, the term “imaginary” is used because there is no real number having a negative square. There are two complex square roots of −1, namely i and −i, just as there are two complex square roots of every real number other than zero (which has one double square root).

## Is the square root of a negative number imaginary?

If the value in the radicand is negative, the root is said to be an imaginary number. The imaginary number i is defined as the square root of negative 1.

## Can imaginary roots be negative?

Imaginary roots appear in a quadratic equation when the discriminant of the quadratic equation — the part under the square root sign (b2 – 4ac) — is negative. If this value is negative, you can’t actually take the square root, and the answers are not real. Observe that when s=0, you simply have the real numbers.

## What is the square of a negative imaginary number?

The square root don’t exist for the negative number. Therefore it’s said imaginary. It can be written as square root of (-1) multiplied by the square root of (x). And square root of (-1) is i or j commonly known as iota.

## What is the square root of negative 2 imaginary number?

There is no real number multiplied by itself that will equal -2. Note: since negative times negative equals positive, one could therefore conclude that -1.414 i is also a correct answer to the square root of negative 2.

## How do you know if roots are imaginary?

To determine the nature of roots of quadratic equations (in the form ax^2 + bx +c=0) , we need to caclulate the discriminant, which is b^2 – 4 a c. When discriminant is greater than zero, the roots are unequal and real. When discriminant is equal to zero, the roots are equal and real.

## Can zeros be imaginary?

State the possible number of positive real zeros, negative real zeros, and imaginary zeros of h(x) = –3×6 + 4×4 + 2×2 – 6. Since h(x) has degree 6, it has six zeros. However, some of them may be imaginary. Thus, the function h(x) has either 2 or 0 positive real zeros and either 2 or 0 negative real zeros.

## What is the square root of a negative imaginary number?

It as simple as of the square root of positive number. The square root don’t exist for the negative number. Therefore it’s said imaginary. It can be written as square root of (-1) multiplied by the square root of (x). And square root of (-1) is i or j commonly known as iota. And it represents imaginary number.

## Which is the square root of minus one?

The principal square root of minus one is i. It has another square root −i. I really dislike the expression ” the square root of minus one”. Like all non-zero numbers, −1 has two square roots, which we call i and −i. If x is a Real number then x2 ≥ 0, so we need to look beyond the Real numbers to find a square root of −1.

## Is the square root of −1 a real number?

Like all non-zero numbers, −1 has two square roots, which we call i and −i. If x is a Real number then x2 ≥ 0, so we need to look beyond the Real numbers to find a square root of −1. Complex numbers can be thought of as an extension of Real numbers from a line to a plane. The unit in the x direction is the number 1.

## Is the square root of 9 positive or negative?

“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.