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Mathematics 8 Online
OpenStudy (anonymous):

a

OpenStudy (lgbasallote):

which do you think?

OpenStudy (lgbasallote):

hmm where did you distribute here?

OpenStudy (lgbasallote):

hint: you're going to turn a - 2b + 2a into a + 2a - 2b

OpenStudy (lgbasallote):

so what's happening?

OpenStudy (perl):

you want to collect like terms, so on the left side, we have that 2b in between the a's

OpenStudy (lgbasallote):

why would you think that

OpenStudy (lgbasallote):

it's the right answer actually..i just want to know if you know why

OpenStudy (lgbasallote):

it's commutative

OpenStudy (perl):

you need to use the commutative property to collect like terms on the left side.

OpenStudy (lgbasallote):

because you're changing the order

OpenStudy (perl):

you can think of commutative property as switching the order of two terms (one pair at a time)

OpenStudy (lgbasallote):

a - 2b + 2a becomes a + 2a - 2b...different order right?

OpenStudy (perl):

lg, what do you do after you get 3a -2b = 3a - 2b ?

OpenStudy (lgbasallote):

btw it's LGBASALLOTE

OpenStudy (perl):

im not sure what this question is asking, to simplify further ... go on

OpenStudy (lgbasallote):

i think it's just asking how the LHS can look lie RHS

OpenStudy (lgbasallote):

like*

OpenStudy (perl):

ok, then it's an identity

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