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Mathematics 23 Online
OpenStudy (anonymous):

Subtract: 2x2 - 4x - 3 from x2 - 5x - 8.

OpenStudy (anonymous):

what's 2x^2 - 1x^2?

OpenStudy (anonymous):

what's 2 - 1?

OpenStudy (anonymous):

x^2

OpenStudy (anonymous):

good. now what's -4x - (-5x)

OpenStudy (anonymous):

anytime you have minus a negative number ( - (-something)) you get +. in other words, -- = +

OpenStudy (anonymous):

x

OpenStudy (anonymous):

good. now all that's left is -3 - (-8)

OpenStudy (anonymous):

5

OpenStudy (anonymous):

Excellent, so put all of those terms together and what do you have?

OpenStudy (anonymous):

oh crap hold on. We did it backwards I'm sorry.

OpenStudy (anonymous):

x^2+x+5

OpenStudy (anonymous):

I read that wrong so actually step 1 was x^2 - 2x^2

OpenStudy (anonymous):

-x^2

OpenStudy (anonymous):

step 2 is -5x - (-4x) and step 3 is -8 -(-3).

OpenStudy (anonymous):

yeah first part is right. good job.

OpenStudy (anonymous):

so its -x^2+x-5

OpenStudy (anonymous):

Your x term has the wrong sign, it's -5x-(-4x), what is that?

OpenStudy (anonymous):

-x

OpenStudy (anonymous):

good.

OpenStudy (anonymous):

So yeah, x^2 - x - 5, you got it.

OpenStudy (anonymous):

lol crap i mean -x^2 - x - 5

OpenStudy (anonymous):

lol thx

OpenStudy (anonymous):

np :) good work.

OpenStudy (anonymous):

thanks you too

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