what is an imaginery number in mathematics?

Answer 1

An imaginary number is any real number, negative or positive, multiplied by the factor i, where i=sqrt(-1)......

Answer 2

When solving a quadratic equation and the number under the radical is a negative, then the answer will be an imaginary number, or complex number. The square root of any negative number will give the imaginary number.

Answer 3

Mathematicians tend to make up answers when there are none.

Negative numbers were created to answer questions like, "What is 3 minus 5?"

Fractions were invented to answer questions such as, "What is 7 divided by 5?"

Imaginary numbers were invented to answer, "What is the square root of -1?"

The answer to this question is i (the imaginary unit). So when your teacher says that there aren't square roots of negative numbers, you know that they are wrong!

More examples:
sqrt(-9) = 3i
sqrt(-16) = 4i
sqrt(-2) = i*sqrt(2)

Answer 4

Imaginary = Unreal = not part of the real number set, R.

More specifically, complex numbers are defined as
z = a + bi
where a, b are real and i² = -1. Every complex number z E Z thus has a real part (a) and an imaginary part (bi).

This allows to solve things like the square root of negative numbers.

Answer 5

The square root of a negative number.

Answer 6

An imaginary number is a number that when squared, is a negative real number. They are represented by the letter 'i'.

Answer 7

the square root of a negative number

Answer 8

it is a number that as either i, j, or k which represents the square rout of -1 for example the square rout of -4 is 2i

Answer 9

Any number sqr[-1] == i as coefficient
Consider a number y = a + bi where a, b are real number so that the imaginary part is bi

Answer 10

i just cant think or 1