Maths

Original post by Elisa2000

Look, minus sqrt 2 and sqrt 2 when multiplied make minus 2

Look what?? You're right.

-\sqrt{2} \sqrt{2}=-2

Reply 23

Original post by Notch

My numerator factors were -42√2, 153, -56 and 102√2
Did you get the same?

Yeah I did. Your answer is still remarkably wrong. Check it. :smile:

Reply 24

Notch

Original post by RDKGames

Yeah I did. Your answer is still remarkably wrong. Check it. :smile:

Well 153 - 56 = 97 and 102√2 - 42√2 = 60√2
and the denominator is 1... I don't see where I went wrong

(edited 7 years ago)

Reply 25

Original post by RDKGames

Look what?? You're right.

-\sqrt{2} \sqrt{2}=-2

Exactly, so you take that away from 211 ( 153 + 28)

Reply 26

Original post by Notch

Well 153 - 56 = 97 and 102√2 - 42√2 = 60√2
the denominator is 1, so?

Yeah. Can you see how different it is to:

Original post by Notch

If you want my answer:

Spoiler

Reply 27

Notch

loool gotcha, the worst part is i wrote it down as 97 + 60√2 ;_;

Reply 28

Original post by RDKGames

Yeah I did. Your answer is still remarkably wrong. Check it. :smile:

Where did you get the -56 from???

Reply 29

Original post by Elisa2000

Exactly, so you take that away from 211 ( 153 + 28)

No. You misunderstand the calculation.

153-28\sqrt{2}\sqrt{2}=153+28(-\sqrt{2}\sqrt{2})=153+28(-2)=153+(-56)=153-56

(edited 7 years ago)

Reply 30

PossiblyNotGod

I got

\frac{97+60\sqrt{2}}{1}

I could plug it into a calculator and check but I'm too lazy.

Reply 31

Original post by RDKGames

No. You misunderstand the calculation.

153-28\sqrt{2}\sqrt{2}=153+28(-\sqrt{2}\sqrt{2})=153+28(-2)=153+(-56)=153-56

How come you are multiplying the -2 ?

Reply 32

EricPiphany

Original post by XOR_

I got

\frac{97+60\sqrt{2}}{1}

I could plug it into a calculator and check but I'm too lazy.

well done

Reply 33

Original post by Elisa2000

How come you are multiplying the -2 ?

You are multiplying 28 by

-\sqrt{2}\sqrt{2}

We have established that

-\sqrt{2}\sqrt{2}

is equal to

-2

So we are multiplying 28 by -2.

Reply 34