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Anatoly

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Re: lets have some maths

4-2/9+2/9 =
root{(4-9/2) ^ 2} + 9/2

why

Root divides it. The "^" symbol makes it double
a*a=b
root(b) = a
a^2  = b
makes sence

TaskManager

Formerly maxi123

From: i really should update this

Joined: 2015-03-01

Posts: 9,463

Re: lets have some maths

4-2/9+2/9 =
root{(4-9/2) ^ 2} + 9/2

why

Root divides it. The "^" symbol makes it double
a*a=b
root(b) = a
a^2  = b
makes sence

no i mean
why did you replace 2/9 with 9/2?

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Anatoly

Guest

Re: lets have some maths

oh sorry i meant 9/2 (always)

Fixed

Anatoly

Guest

Re: lets have some maths

so did someone found my mistake?

912468

Member

Joined: 2015-02-21

Posts: 212

Website

Re: lets have some maths

▼Hidden text

prove that please We all know 2+2=4, but i get 5...
2+2 =
4-9/2+9/2 =
root{(4-9/2) ^ 2} + 9/2 =
root{16- 2* 4 * 9/2 + (9/2) ^ 2} + 9/2 =
root{16-36+(9/2)^2} + 9/2 =
root{-20+(9/2)^2} + 9/2 =
root{25-45 + (9/2) ^ 2} + 9/2 =
root{5^2 - 2 * 5 * 9/2 + (9/2)^2} +9/2

and here it goes... Befor we had
root{16- 2* 4 * 9/2 + (9/2) ^ 2} + 9/2 =
now:
root{5^2 - 2 * 5 * 9/2 + (9/2)^2} +9/2

then we get:
= root{(5-2/9)^2} + 9/2 =
5 - 9/2 + 9/2 =
5

This makes sence, where is my mistake??
5 = 4 or what??

4-9/2+9/2 =
root{(4-9/2) ^ 2} + 9/2 =

(4 - 9/2) is a negative number. When you bring it to the power of 2, it becomes positive. A root has always a positive and a negative solution, so when you erase the root in the end, you need to take the negative one. I wrote your last steps in a word file to make it easier to read:

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Anatoly

Guest

Re: lets have some maths

▼Hidden text

prove that please We all know 2+2=4, but i get 5...
2+2 =
4-9/2+9/2 =
root{(4-9/2) ^ 2} + 9/2 =
root{16- 2* 4 * 9/2 + (9/2) ^ 2} + 9/2 =
root{16-36+(9/2)^2} + 9/2 =
root{-20+(9/2)^2} + 9/2 =
root{25-45 + (9/2) ^ 2} + 9/2 =
root{5^2 - 2 * 5 * 9/2 + (9/2)^2} +9/2

and here it goes... Befor we had
root{16- 2* 4 * 9/2 + (9/2) ^ 2} + 9/2 =
now:
root{5^2 - 2 * 5 * 9/2 + (9/2)^2} +9/2

then we get:
= root{(5-2/9)^2} + 9/2 =
5 - 9/2 + 9/2 =
5

This makes sence, where is my mistake??
5 = 4 or what??

4-9/2+9/2 =
root{(4-9/2) ^ 2} + 9/2 =

(4 - 9/2) is a negative number. When you bring it to the power of 2, it becomes positive. A root has always a positive and a negative solution, so when you erase the root in the end, you need to take the negative one. I wrote your last steps in a word file to make it easier to read:

thx