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/sci/ - Science & Math

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2731237 No.2731237 [Reply] [Original]

So I'm having some trouble completely forgotten how to simplify expressions, any help to solve this one..

>> No.2731294

pls go.

>> No.2731300

>solve
>no equation

Maybe if you actually understood what you were doing I might help you.

>> No.2731303

>>2731300

How would you simplify? step by step. Sorry if was misleading

>> No.2731310

http://www.wolframalpha.com/input/?i=%28r%C2%B2%2B3t%C2%B2%2B9%29-%282r%C2%B2%2B3t%C2%B2-4%29

>> No.2731315
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2731315

distribute the negative sign.
r^2+3*t^2+9-(2*r^2+3*t^2-4)
=r^2+3*t^2+9-2*r^2-3*t^2+4
=-r^2+13

>> No.2731322

>>2731315

Thanks, I can see now,