answersLogoWhite

0

What is an unreal number?

User Avatar

Wiki User

βˆ™ 2016-01-29 12:47:29

Best Answer

Imaginary and complex numbers are an extension of the Real Number system. They are not called unreal.

An imaginary number is a non-existent number, like the square root of a negative number. For example, the square root of -4 is 2i (i stands for imaginary). There are also complex numbers, which are defined as the sum of a real number and an imaginary number (e.g. 4 + 3i).

An imaginary number does not exist, but can nevertheless be useful in certain applications. An imaginary number is any number that is the product of a real number and the square root of negative one (-1). The square root of -1 is the "unit" of the set of imaginary numbers, and is referred to as "i". As you know, negative numbers cannot have square roots, and so the square root of any negative number is "imaginary".

There are also "complex numbers", which are the sum of a real number and an imaginary number. For example 3 + 2i.

User Avatar

Wiki User

βˆ™ 2016-01-29 12:47:29
This answer is:
User Avatar
Study guides

Algebra

20 cards

A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

➑️
See all cards
3.8
β˜†β˜…β˜†β˜…β˜†β˜…β˜†β˜…β˜†β˜…
2519 Reviews

Add your answer:

Earn +20 pts
Q: What is an unreal number?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Algebra

Why is square root of the number -9 not a real number?

For the same reason that the square root of ANY negative number is not a real number.Real numbers are positive, negative, or zero. * The square of a positive number is a positive number. * The square of a negative number is a positive number. * The square of zero is zero. In other words, in no case will you get a REAL number whose square is a negative number. The square roots of negative numbers are said to be "imaginary" - a name given for historical reasons. They are just as "real" or "unreal" as the so-called real numbers, but the point is that they are a different kind of numbers.


What are the rules fr multiplication and divisions of integers?

(positive number) x (positive number) = positive number (positive number)/(positive number) = positive number (positive number) x ( negative number) = negative number (positive number)/( negative number) = negative number (negative number) x (negative number) = positive number (negative number)/(negative number) = positive number


What is a negative number divided by a negative number?

A negative number divided by a negative number is a positive number.


Is 81 a rational number?

Yes. 81 is a:- Real number - Rational number - Integer - Natural number - Counting number - Square number - Odd number


When dividing negative number by a positive number what is the results?

A negative number divided by a positive number will be a negative number. For example: -20 / 4 = -5 -100 / 2 = -50 Here are the other cases of division by positive or negative numbers. A negative number divided by a negative number would be a positive number. A positive number divided by a positive number would be a positive number. A positive number divided by a negative number would be a negative number.

People also asked

Weather conditions may affect your predictions?

View results

Difference between an MD and an ARNP?

View results

What is a ribbon when applying ointment to eye?

View results

Did Zeus have a trident?

View results