Quick math question, HELP!

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Quick math question, HELP!

2008-06-29 16:06:16

Eagle: Togs8896 is my evil alter ego; +567|7097|New Hampshire, USA

It is really easy, im just having a brain fart.

if N = -3 then N^2 - N = ?

It goes
-3^2 + 3=
-9 + 3 = -6

Now the probelm im having is with the exponent

-3^2 is -9
but
(-3)^2 is 9

I'm not sure if when you substitute the -3 for N if it is in parenthesies or not.

Help please!

https://static.bf2s.com/files/user/14407/Sig_Pats.jpg

2008-06-29 16:07:16

naightknifar: Served and Out; +642|7027|Southampton, UK

N = I am shit at maths.

2008-06-29 16:08:26

Ryan: Member; +1,230|7309|Alberta, Canada

Gah, I always have the same problem as you.

-3 x -3 is 9, because a negative times a negative is a positive.
9 subtract -3 is the same as just add it, so your answer is 12.

I think...

2008-06-29 16:09:26

i g: Banned; +876|6330|GA

with parenthesis

2008-06-29 16:10:16

usmarine2: Banned; +233|6257|Dublin, Ohio

procrastinated all weekend on the homework eh?

2008-06-29 16:10:22

GateKeeper{NL}: Member; +142|6835

-6 + 12= 6

2008-06-29 16:10:23

Eagle: Togs8896 is my evil alter ego; +567|7097|New Hampshire, USA

Eye-GiZzLe wrote:
with parenthesis

Fo sho?

usmarine2 wrote:
procrastinated all month on the homework eh?

fix'd

Last edited by -=]NS[=-Eagle (2008-06-29 16:11:26)

2008-06-29 16:14:20

Ryan: Member; +1,230|7309|Alberta, Canada

Is it in parenthesis or not?

2008-06-29 17:01:47

SpIk3y: Minister of Silly Walks; +67|6605|New Jersey

If you wrote the problem right, the answer is 12. Definitely not 6.

Whenever you substitute a value for a variable, the value has parentheses around it. Always.

Last edited by SpIk3y (2008-06-29 17:04:02)

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Eye-GiZzLe wrote:

usmarine2 wrote:

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