4=5 Is it true?

[Dark Nebulae]

Everyone knows that 4 can never be equal to 5, but in this proof you can see it.If you think that there is any mistake you can point out.
Proof:
4=4 (all of us will agree, right?)

now multiply both sides with -5, we get

-20 = -20

or 16-36 = 25-45

by adding 81/4 both sides, we get

16-36+81/4=25-45+81/4

or (4-9/2)x(4-9/2) = (5-9/2)x(5-9/2)

Taking square root both sides, we get

(4-9/2)=(5-9/2)


__> 4=5

Hece, prooved

[p_2001]

Hence.UNPROVED
YOU FAIL!
Look carefully mate.. Your are taking square root of NEGATIVE.. AS IN A NEGATIVE.

come on mate.. Since when is the result of a square root negative?
You are doing basic math wrong..
When taking square root it is kept in mind that the expression being taken root of is not negative.

[DangerousLlama]

Hence.UNPROVED
YOU FAIL!
Look carefully mate.. Your are taking square root of NEGATIVE.. AS IN A NEGATIVE.

come on mate.. Since when is the result of a square root negative?
You are doing basic math wrong..
When taking square root it is kept in mind that the expression being taken root of is not negative.

[p_2001]

In complex numbers it will translate to iShit

[Axon]

Learn proper mathematical logic before posting hahahaha

[puddi]

so does that make pi = 3,15?

[Dark Nebulae]

Hence.UNPROVED
YOU FAIL!
Look carefully mate.. Your are taking square root of NEGATIVE.. AS IN A NEGATIVE.


When taking square root it is kept in mind that the expression being taken root of is not negative.

Where have I taken the square root of a negative. I think you didn't understood that it was (4-9/2)^2 and (5-9/2)^2.
On taking square root we get (4-9/2)=(5-9/2).
I am not solving the brackets. You understand?

[p_2001]

Where have I taken the square root of a negative. I think you didn't understood that it was (4-9/2)^2 and (5-9/2)^2.
On taking square root we get (4-9/2)=(5-9/2).
I am not solving the brackets. You understand?

I concede defeat. Go have your "proof" published.
Look i explained.. You ought to research it yourself.  I am not going to explain it again.

Somewhere you are wrong, I pointed out out.. Now just post this "proof" on a math forum and see.

[Dark Nebulae]

And the math forum is .........
Well if you are unable to find mistakes, u can say   I am defeated. If u have any queries or u want me to answer the error ,u can post. I am not saying that anyone or you don't know maths , it was just to test if the people are having some basic knowledge.

[p_2001]

And the math forum is .........
Well if you are unable to find mistakes, u can say   I am defeated. If u have any queries or u want me to answer the error ,u can post. I am not saying that anyone or you don't know maths , it was just to test if the people are having some basic knowledge.

haha hahahahahaha hahahahahaha rofl lmao...
My my, You're very amusing.. You're so funny

Kid.. I didn't survive my engineering with weak math.

to quote Shakespeare . " I will not enter a battle of wits with an unarmed enemy"


For your own sake i hope you're just trolling.

[Dark Nebulae]

haha hahahahahaha hahahahahaha rofl lmao...
My my, You're very amusing.. You're so funny

Kid.. I didn't survive my engineering with weak math.

to quote Shakespeare . " I will not enter a battle of wits with an unarmed enemy"


For your own sake i hope you're just trolling.

If you are an engineer then why don't u point out a mistake in my proof???
You are so...............
And on the top of that i am not a kid.If u r more intelligent than a kid then point out the mistake or if u r unable,
just go and take the help of the professor who taught u maths in your engineering. If he is unable,take it to your school teachers and if they are also unable to solve then come to me.

[kateus]

When you take the square root, you can't just assume that it would be positive. Then you could prove -5=5, -4=4, etc.. because


25=25
sqrt(25) = sqrt(25)
-5=5



so when you take the square root you should actually get absolute values, eg:


|(4-9/2)| = |(5-9/2)| and indeed 1/2 = 1/2

[noob]

In python 5 / 2 = 2 .do you know why?

[relax]

In python 5 / 2 = 2 .do you know why?

when you divide in python you need atleast one float

Code: [Select]

>>> 5/2
2
>>> 5/float(2)
2.5
>>> float(5)/2
2.5
>>> float(5)/float(2)
2.5
>>> float(5/2)
2.0

[Uriah]

In python 5 / 2 = 2 .do you know why?

Without using a float to make the exact result of the division in decimal points, you just get the nearest whole number as a result. If you take 2 ints you get an int(whole number). if you take 2 floats(decimal), or a float and an int, you get a float.
in simpler terms, 5/2 in python is asking for a whole number. 5.0/2 or 5/2.0 or 5.0/2.0 is asking for a more exact, decimal result.