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simplify (9a^2b-15ab-12)+(-9a^2b+14ab+9)

Sagot :

=9a^2b-9a^2b-15ab+14ab-12+9
=ab-3


Rearrange similar factors, factors that have the same variables, then do the operation.
Rearranging means to JUST put together the similar ones and not to change the sign, like in TRANSPOSING......