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It is not a requirement. However, it is easier to divide mentally if the denominator is a rational number.

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Q: Why do you only have to get rid of the imaginary number in the denominator when dividing by imaginary numbers?
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Related questions

Can an imaginary number be obtained by dividing two real numbers?

No.


Is 5i a complex number?

Yes it is. All pure imaginary numbers (such as 5i) as well as all real numbers and any combination of real & imaginary (by adding, subtractin, multiplying, dividing) makes a complex number.


The number you are dividing by in a division problem?

Denominator


Can a fraction contain an imaginary number in the denominator?

yes


Does dividing by zero result in an imaginary number?

No. Dividing by zero is undefined. It does not result in anything.


How is dividing mixed numbers the same as dividing fractions?

A mixed number can be converted into an improper fraction. Mixed numbers as improper fractions can be divided just like any other fraction. To convert a mixed number to an improper fraction multiply the whole number by the denominator and add the original numerator to give the new numerator and put this over the original denominator.


What is the difference between imaginary numbers and complex numbers?

No difference. The set of complex numbers includes the set of imaginary numbers.


What are imagery numbers?

imaginary numbers are numbers that are a negative square root, which is not possoble therefor it is called and imaginary number. ex the square root of -24 is an imaginary number


Why do you have to switch the numerator and denominator when dividing fractions?

This is because dividing by a number is the same as multiplying by its reciprocal.


How do you simplify a number that is bigger than the denominator?

simplify by dividing


What do you do when the fraction of a mixed number is improper?

You make a mixed number by dividing the merator to the denominator by putting the remainder over the denominator.


How dividing by decimal is similar from dividing whole number?

Consider 23/1.344 This can be written as 23000/1344 (we multiplied both numerator and denominator by 1000 and doing so does not change the original value). Lo and behold we have converted dividing by decimal to dividing whole numbers. Consider 23.089/4.6788 This can be written as 230890/46788 (we multiplied both numerator and denominator by 10000 and doing so does not change the original value). Lo and behold we have converted dividing by decimal to dividing whole numbers.