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Mathematics 20 Online
OpenStudy (anonymous):

From 4a + 7b - 12c subtract 8a - 9b + 12d.

OpenStudy (anonymous):

i got 4a^2-2b?

OpenStudy (aroub):

do u mean 4a+7b-12 - 8a-9b+12d

OpenStudy (anonymous):

ya

OpenStudy (aroub):

4a-2b+12d-12c

OpenStudy (anonymous):

-4a + 16b -12d -12

OpenStudy (anonymous):

oops

OpenStudy (aroub):

u have to subtract

OpenStudy (anonymous):

yeah so 4a - 8a is -4a

OpenStudy (anonymous):

and +7b - (-9b) which makes a + 9b... = +16b

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