# HOW TO FIND SIMPLEST RATIONALIZING FACTOR

## About "How to find simplest rationalizing factor"

How to find simplest rationalizing factor ? :

Here we are going to how to find the simplest rationalizing factor.

If the product of two irrational numbers is rational, then each one is called the rationalizing factor of the other

• (a + √x) and (a + √x) are rationalizing factors of each other.
• (a + b√x) and (a - b√x) are rationalizing factors of each other.
• x + y and √x y are rationalizing factors of each other.

## How to find simplest rationalizing factor - Examples

Example 1 :

Write the rationalizing factor of the following

3√2

Solution :

3√2 is irrational number.

By multiplying 3√2 by √2, we get rational number.

=  3√2 ⋅ √2

=  3√(2 ⋅ 2)

Since we have two same numbers multiplying inside the radical, we can factor out one term.

=  3 ⋅ 2

=  6 is the rational number

Hence the rationalizing factor of 3√2 is √2.

Example 2 :

Write the rationalizing factor of the following

5

Solution :

5 is irrational number.

By multiplying 5 by 25, we may get rid of the cube root.

=  2 ⋅ 25

=  2 ∛(5 ⋅ 25)

=  2 ∛(5 ⋅ 5 ⋅ 5)

=  2 ⋅ 5

=  10 is rational number

Hence the rationalizing factor of 5 is 25.

Example 3 :

Write the rationalizing factor of the following

5 - 4√3

Solution :

Rationalizing factor of 5 - 4√3 is 5 + 4√3

(5 - 4√3) (5 + 4√3)  =  5(5) + 5(4√3) - 4√3(5) - 16(√3√3)

=  25 + 20 √3 - 20 √3 - 16 (3)

=  25 - 48

=  -23 it is rational number

Hence the rationalizing factor of 5 - 4√3 is 5 + 4√3

Example 4 :

Write the rationalizing factor of the following

√2 + √3

Solution :

Rationalizing factor of √2 + √3 is √2 - √3

Example 5 :

Write the rationalizing factor of the following

√5 - √2

Solution :

Rationalizing factor of √5 - √2 is √5 + √2

Example 6 :

Write the rationalizing factor of the following

2 + √3

Solution :

Rationalizing factor of 2 + √3 is 2 - √3

Let us look into the next example on "How to find simplest rationalizing factor".

Example 7 :

Write the rationalizing factor of the following

√75

Solution :

To find the least number to be multiplied to convert √75 as rational number.We have to split 75.

√75  =  √(5 ⋅ 5 ⋅ 3)

√75  √3  =  √(5 ⋅ 5 ⋅ 3)  √3

=  √(5 ⋅ 5 ⋅ 3 ⋅ 3)

=  15 is the rational number

Hence √3 is the rationalizing factor of √75.

Let us look into the next example on "How to find simplest rationalizing factor".

Example 8 :

Write the rationalizing factor of the following

5 - 7√3

Solution :

Rationalizing factor of 5 - 7√3 is 5 + 7√3

## Related topics

We hope that the students would have understood the stuff given on "How to find simplest rationalizing factor"

Apart from the stuff given above, if you want to know more about "How to find simplest rationalizing factor"

If you need any other stuff, please use our google custom search here.

You can also visit our following web pages on different stuff in math.

WORD PROBLEMS

Word problems on simple equations

Word problems on linear equations

Algebra word problems

Word problems on trains

Area and perimeter word problems

Word problems on direct variation and inverse variation

Word problems on unit price

Word problems on unit rate

Word problems on comparing rates

Converting customary units word problems

Converting metric units word problems

Word problems on simple interest

Word problems on compound interest

Word problems on types of angles

Complementary and supplementary angles word problems

Double facts word problems

Trigonometry word problems

Percentage word problems

Profit and loss word problems

Markup and markdown word problems

Decimal word problems

Word problems on fractions

Word problems on mixed fractrions

One step equation word problems

Linear inequalities word problems

Ratio and proportion word problems

Time and work word problems

Word problems on sets and venn diagrams

Word problems on ages

Pythagorean theorem word problems

Percent of a number word problems

Word problems on constant speed

Word problems on average speed

Word problems on sum of the angles of a triangle is 180 degree

OTHER TOPICS

Profit and loss shortcuts

Percentage shortcuts

Times table shortcuts

Time, speed and distance shortcuts

Ratio and proportion shortcuts

Domain and range of rational functions

Domain and range of rational functions with holes

Graphing rational functions

Graphing rational functions with holes

Converting repeating decimals in to fractions

Decimal representation of rational numbers

Finding square root using long division

L.C.M method to solve time and work problems

Translating the word problems in to algebraic expressions

Remainder when 2 power 256 is divided by 17

Remainder when 17 power 23 is divided by 16

Sum of all three digit numbers divisible by 6

Sum of all three digit numbers divisible by 7

Sum of all three digit numbers divisible by 8

Sum of all three digit numbers formed using 1, 3, 4

Sum of all three four digit numbers formed with non zero digits

Sum of all three four digit numbers formed using 0, 1, 2, 3

Sum of all three four digit numbers formed using 1, 2, 5, 6