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What is the different of real root between unreal root?

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## Related Questions

###### Asked in Math and Arithmetic, Algebra

### The real fourth roots of -16?

there are no real answers to an even root (2,4,6,8) of any
negative number. the innovation of i allows you to find the unreal
answers. i= the fourth root of positive 16 is 2. so, the roots of
-16 are positive and negative 2i. post script: you cannot have a
real even root of a negative because a negative multiplied by a
negative turns into a positive.

###### Asked in Algebra

### What is an unreal number?

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.

###### Asked in Math and Arithmetic

### Is there a minus square root?

Yes there are. This is where mathematics gets more complicated,
and it is called 'imaginary' or 'unreal' numbers. Commonly
i=(-1)1/2 meaning the square root of negative 1, and i is used
instead of the number. Look up complex numbers where imaginary and
real numbers are combined. Commonly it can be transferred to a real
number if i can be squared because it will equal -1.

###### Asked in Numerical Series Expansion

### Can bisection method give us two answers for different intervals for same equation i have equation 2x3 plus x2-20x plus 12 equals 0. i have to find real root upto 3 correct decimal places. I chose int?

Yes. A cubic equation can have 3 real roots. Depending on their
size, each of three intervals could contain a root. In that case
different intervals must give different roots.
Yes. A cubic equation can have 3 real roots. Depending on their
size, each of three intervals could contain a root. In that case
different intervals must give different roots.
Yes. A cubic equation can have 3 real roots. Depending on their
size, each of three intervals could contain a root. In that case
different intervals must give different roots.
Yes. A cubic equation can have 3 real roots. Depending on their
size, each of three intervals could contain a root. In that case
different intervals must give different roots.