Asked by: Rosio Schmidthals
business and finance interest rates

Why do we rationalize denominators?

Last Updated: 8th February, 2020

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In cases where you have a fraction with a radical in thedenominator, you can use a technique calledrationalizing a denominator to eliminate the radical.The point of rationalizing a denominator is to makeit easier to understand what the quantity really is by removingradicals from the denominators.

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In this manner, why do we rationalize?

Rationalization is actually a defense mechanismthat allows you to justify bad behavior or feelings. It's away to distort facts to make things look better than they do– to convince others and yourself that your motives andactions are good, not bad.

how do we rationalize? So, in order to rationalize the denominator, we need to getrid of all radicals that are in the denominator.

  1. Step 1: Multiply numerator and denominator by a radical thatwill get rid of the radical in the denominator.
  2. Step 2: Make sure all radicals are simplified.
  3. Step 3: Simplify the fraction if needed.

Secondly, how do you rationalize denominators?

Rationalize the Denominator."Rationalizing the denominator" is when wemove a root (like a square root or cube root) from the bottom of afraction to the top.

What does it mean to rationalize a number?

The process by which a fraction is rewritten so that thedenominator contains only rational numbers. A variety oftechniques for rationalizing the denominator aredemonstrated below. Square Roots. (a > 0, b > 0, c > 0)Examples.

Related Question Answers

Baudelio Wehrle

Professional

What is a synonym for rationalization?

account (for), attribute, explain, explain away. WordsRelated to rationalize. condone, excuse, forgive, justify.absolve, acquit, exculpate, exonerate, vindicate.

Khadijatou Itts

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What is an example of rationalization?

Examples of Rationalization
Most of us engage in rationalization on asemi-regular basis. A person might account for a bad mood orgeneral rude behavior by explaining that bad traffic affected themorning commute, for example.

Arletta Izarbekoa

Professional

What do you mean by rationalization?

In psychology and logic, rationalization orrationalisation (also known as making excuses) is a defensemechanism in which controversial behaviors or feelings arejustified and explained in a seemingly rational or logical mannerto avoid the true explanation, and are made consciouslytolerable—or even admirable and

Saula Brants

Explainer

What is ethical rationalization?

Rationalizations are invented explanations thathide or deny true motivations, causes, or actions. They are theexcuses people give themselves for not living up to their ownethical standards. As psychologist Joshua Greene notes,“rationalization is the great enemy of moralprogress.”

Lhassane Luzean

Explainer

How do you define a radical?

Radical. An expression that uses a root, such assquare root, cube root. See definition of root. The numberof times the radicand is multiplied by itself.

Sol Maneta

Pundit

How do you Rationalise Surds?

Rationalising denominators
  1. A fraction whose denominator is a surd can be simplified bymaking the denominator rational .
  2. If the denominator has just one term that is a surd, thedenominator can be rationalised by multiplying the numerator anddenominator by that surd.
  3. Rationalise the denominator of .

Saed Oettinger

Pundit

How do you rationalize a denominator with two terms?

To rationalize the denominator, you must multiplyboth the numerator and the denominator by the conjugate ofthe denominator. Remember to find the conjugate all you haveto do is change the sign between the two terms.

Berniece Hakimi

Pundit

How do you simplify fractions?

How to simplify a fraction:
  1. Find a common factor of the numerator and denominator.
  2. Divide both the numerator and denominator by the commonfactor.
  3. Repeat this process until there are no more commonfactors.
  4. The fraction is simplified when no more common factorsexist.

Silver Berntzen

Pundit

Why do we use conjugates?

We cannot just go around and change the value ofexpressions so that we can get rid of radicals. There needsto be some logical or practical reason. For instance, multiplyingan expression by its conjugate is very useful whensimplifying certain fractions.

Wenlong Jeanpierre

Teacher

How do you multiply fractions?

To multiply fractions:
  1. Simplify the fractions if not in lowest terms.
  2. Multiply the numerators of the fractions to get the newnumerator.
  3. Multiply the denominators of the fractions to get the newdenominator.

Malainine Eastaway

Teacher

How do you simplify Surds?

To simplify a surd, write the number underthe root sign as the product of two factors, one of which is thelargest perfect square. Note that the factor 16 is the largestperfect square. Recall that the numbers 1, 4, 9, 16, 25, 36, 49,are perfect squares.

Conmemoracion Langpap

Teacher

How do you subtract radicals?

To add or subtract radicals, the indices and whatis inside the radical (called the radicand) must be exactlythe same. If the indices and radicands are the same, then add orsubtract the terms in front of each like radical. Ifthe indices or radicands are not the same, then you can not add orsubtract the radicals.

Gwendoline Voelkmann

Reviewer

How do you divide fractions?

To divide fractions take the reciprocal (invertthe fraction) of the divisor and multiply the dividend. Thisis the quickest technique for dividing fractions. The topand bottom are being multiplied by the same number and, since thatnumber is the reciprocal of the bottom part, the bottom becomesone.

Jennifer Ambrosino

Reviewer

How do you simplify complex fractions?

How to simplify complex fractions
  1. Convert mixed numbers to improper fractions.
  2. Reduce all fractions when possible.
  3. Find the least common denominator (LCD) of all fractionsappearing within the complex fraction.
  4. Multiply both the numerator and the denominator of the complexfraction by the LCD.

Khawla Saiago

Reviewer

What is rationalizing factor?

Rationalising factor is a term with which a termis multiplied or divided to make the whole term rational.Rationalising factor of 15 - √3 is 15 +√3.

Zenona Borghoff

Supporter

How do you divide radicals?

Dividing Radicals: When dividing radicals(with the same index), divide under the radical, andthen divide in front of the radical (divideany values multiplied times the radicals). ANSWER:Divide out front and divide under theradicals.

Ales Steinl

Supporter

How do you get rid of a square root in the denominator?

Rationalizing with one radical in thedenominator
Instead, follow these steps: Multiply the numerator andthe denominator by the same square root. Whatever youmultiply to the bottom of a fraction, you must multiply to the top;this way, it's really like you multiplied by one and you didn'tchange the fraction.

Malinka Aboufaris

Beginner

What is Rationalisation in business Organisation?

Rationalization is a reorganization of a company inorder to increase its operating efficiency. Rationalization mayalso refer to the process of becoming calculable. For example, theintroduction of certain financial models or financial technologiesrationalizes markets and make them more efficient.

Xuying Rege

Beginner

What is economic Rationalisation?

In economics, rationalization is anattempt to change a pre-existing ad hoc workflow into one that isbased on a set of published rules. There is a tendency in moderntimes to quantify experience, knowledge, and work. Therationalization process is the practical application ofknowledge to achieve a desired end.