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# Mathematics - Number System - Ask NCERT

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## Rationalise & find value of cubic expressionIf x = 18−60√18−60, what is the value of x3−5x2+8x−4?

Asked on :05 February 2019:05:12:59 PM

#### Rationalise & find value of cubic expression

If x = $\frac{1}{8-\sqrt{60}}\phantom{\rule{0ex}{0ex}}$, what is the value of

-Added by Harshita Rathore Mathematics » Number System

## Rationalise the denominator = 1√3+√5+√7

Asked on :12 January 2019:05:54:25 PM

## Rationalise the denominator = 1√3+√5+√7

-Added by Himanshi Verma Mathematics » Number System

priyanshu kumar -Answered by Priyanshu Kumar On 17 February 2020:02:57:05 PM

## Find the zero of 2x-5.

Asked on :12 January 2019:10:52:27 AM

## Find the zero of 2x-5.

-Added by Akki chauhan Mathematics » Number System

Master Purushottam

2x-5=0

2x=5

x= 5/2

-Answered by Master Purushottam On 22 August 2019:09:11:57 PM

Akki chauhan

2x-5=0

2x=5

x= 5/2

-Answered by Akki Chauhan On 15 January 2019:09:04:26 AM

khushi chauhan

2x-5=0

2x=5

x= 5/2

-Answered by Khushi Chauhan On 14 January 2019:06:02:58 PM

Akki chauhan

2x-5=0

2x=5

x= 5/2

-Answered by Akki Chauhan On 14 January 2019:10:16:50 AM

Himanshi Verma

2x-5=0

2x=5

x= 5/2

-Answered by Himanshi Verma On 12 January 2019:05:19:01 PM

## Ques.1. prove that 2+2= 5

Asked on :09 January 2019:09:37:10 AM

## Ques.1. prove that 2+2= 5

-Added by Master Purushottam Mathematics » Number System

Nishant Verma

Which is the same as: 16-36 = 25-45
Which can also be expressed as: (2+2) 2 (9 X (2+2) = 52) 9 X 5
Add 81/4 to both sides: (2+2) 2 (9 X (2+2) + 81/4 = 52) 9 X 5 + 81/4
Rearrange the terms: ({2+2}) 9/2) 2 = (5-9/2) 2
Ergo: 2+2 - 9/2 = 5
Hence: 2 + 2 = 5

-Answered by Nishant Verma On 13 October 2019:09:38:52 AM

Shivang Gupta

Which is the same as: 16-36 = 25-45
Which can also be expressed as: (2+2) 2 (9 X (2+2) = 52) 9 X 5
Add 81/4 to both sides: (2+2) 2 (9 X (2+2) + 81/4 = 52) 9 X 5 + 81/4
Rearrange the terms: ({2+2}) 9/2) 2 = (5-9/2) 2
Ergo: 2+2 - 9/2 = 5
Hence: 2 + 2 = 5

-Answered by Shivang Gupta On 25 August 2019:03:18:52 PM

Master Purushottam

Which is the same as: 16-36 = 25-45
Which can also be expressed as: (2+2) 2 (9 X (2+2) = 52) 9 X 5
Add 81/4 to both sides: (2+2) 2 (9 X (2+2) + 81/4 = 52) 9 X 5 + 81/4
Rearrange the terms: ({2+2}) 9/2) 2 = (5-9/2) 2
Ergo: 2+2 - 9/2 = 5
Hence: 2 + 2 = 5

-Answered by Master Purushottam On 22 August 2019:09:00:11 PM

Akki chauhan

Which is the same as: 16-36 = 25-45
Which can also be expressed as: (2+2) 2 (9 X (2+2) = 52) 9 X 5
Add 81/4 to both sides: (2+2) 2 (9 X (2+2) + 81/4 = 52) 9 X 5 + 81/4
Rearrange the terms: ({2+2}) 9/2) 2 = (5-9/2) 2
Ergo: 2+2 - 9/2 = 5
Hence: 2 + 2 = 5

-Answered by Akki Chauhan On 15 January 2019:09:03:13 AM

Himanshi Verma

Which is the same as: 16-36 = 25-45
Which can also be expressed as: (2+2) 2 (9 X (2+2) = 52) 9 X 5
Add 81/4 to both sides: (2+2) 2 (9 X (2+2) + 81/4 = 52) 9 X 5 + 81/4
Rearrange the terms: ({2+2}) 9/2) 2 = (5-9/2) 2
Ergo: 2+2 - 9/2 = 5
Hence: 2 + 2 = 5

-Answered by Himanshi Verma On 14 January 2019:05:53:04 PM

khushi chauhan

0 = 0

=>4–4 = 10 - 10

=>2²-2² = 2x5 - 2x5

=>(2 - 2)(2 + 2) = 5(2 - 2)

Cancelling (2–2) from both sides we get

2+2 = 5

Proved.

But this is totally wrong, I guess even you know that we can't cancel (2–2) from both sides.

Now the real proof

2+2 = 5

It's true only if:

-Answered by Khushi Chauhan On 14 January 2019:05:52:03 PM

Akki chauhan

Let,

22-22 = 10-10

Identity,

a2-b2=(a+b) (a-b)

(2+2) (2-2)=5(2-2)

Now,   (2+2)=5(2-2)÷(2-2)

2+2=5    (Prooved)

-Answered by Akki Chauhan On 10 January 2019:09:44:37 AM

## What is Euclid's division algorithm.

Asked on :09 January 2019:09:36:20 AM

## What is Euclid's division algorithm.

-Added by Master Purushottam Mathematics » Number System

Nishant Verma
The basis of the Euclidean division algorithm isEuclid's division lemma. To calculate the Highest Common Factor (HCF) of two positive integers a and b we use Euclid's division algorithm. HCF is the largest number which exactly divides two or more positive integers.

-Answered by Nishant Verma On 17 October 2019:02:37:10 PM

Akki chauhan
The basis of the Euclidean division algorithm isEuclid's division lemma. To calculate the Highest Common Factor (HCF) of two positive integers a and b we use Euclid's division algorithm. HCF is the largest number which exactly divides two or more positive integers.

-Answered by Akki Chauhan On 05 September 2019:08:40:28 PM

Shivang Gupta

The basis of the Euclidean division algorithm isEuclid's division lemma. To calculate the Highest Common Factor (HCF) of two positive integers a and b we use Euclid's division algorithm. HCF is the largest number which exactly divides two or more positive integers.

-Answered by Shivang Gupta On 25 August 2019:03:18:57 PM

Master Purushottam

The basis of the Euclidean division algorithm isEuclid's division lemma. To calculate the Highest Common Factor (HCF) of two positive integers a and b we use Euclid's division algorithm. HCF is the largest number which exactly divides two or more positive integers.

-Answered by Master Purushottam On 22 August 2019:09:00:20 PM

Himanshi Verma

The basis of the Euclidean division algorithm isEuclid's division lemma. To calculate the Highest Common Factor (HCF) of two positive integers a and b we use Euclid's division algorithm. HCF is the largest number which exactly divides two or more positive integers.

-Answered by Himanshi Verma On 22 March 2019:05:16:21 PM

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