(2a-3b+5c) - (7a+9b+6c)

I think it's -5a^2 -6b^2 -1c^2

wrong, or right? please correct me and explain, thanks!

Question

(2a-3b+5c) - (7a+9b+6c) 

I think it's -5a^2 -6b^2 -1c^2 

wrong, or right? please correct me and explain, thanks!

anonymous · Answer

right

anonymous · Answer

is this  multiplying or subtrcting..???

nicoleced · Answer

subtracting. sorry

anonymous · Answer

then its wrong..!!!

nicoleced · Answer

okay, so how do I do it?

anonymous · Answer

to subtract simply subtract the coefficients of like terms..!!!e'g'

(2-7)a+....

nicoleced · Answer

yeah, that's what I did... no?

anonymous · Answer

you did thiis but you multiply the variables too..!!!you donot have to do that..

nicoleced · Answer

2-7 -5a^2

anonymous · Answer

subtract the coefficeints by taking variable as common...not to multiply...

nicoleced · Answer

so the answer would just be 5a-6b-1c?

anonymous · Answer

see it below..

(2-7)a+(-3-9)b+(5-6)c

now solve it for answer..

nicoleced · Answer

-5a-6b-1c  ... right?

nicoleced · Answer

@zaibali.qasmi

anonymous · Answer

do it again..still wrong ...you did some mistake..!!

nicoleced · Answer

what mistake? I don't understand what I'm doing wrong.

nicoleced · Answer

@zaibali.qasmi

anonymous · Answer

-3-9= what..???

nicoleced · Answer

-6

anonymous · Answer

its your mistake...

-3-9=-12 not -6

nicoleced · Answer

why? I get -6

anonymous · Answer

no..-3-9=-12

coz similar signs always give rise to additio with same sign..

nicoleced · Answer

that crap still gets me confused. ugh

anonymous · Answer

but why..do you noot know the addition and subtraction..??

nicoleced · Answer

of course I know how to add and subtract, its just the negatives and positives that I still don't get. and I have my final in a few hours. I'm fluttered!