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Calculati :
3(-2a + b - 3c) - 2( - a - 3b -c) - ( 3a - 4b -2c )
Va rog !!!

Răspuns :

3(-2a + b - 3c) - 2( - a - 3b -c) - ( 3a - 4b -2c )=
-6a+3b-9c+2a+6b+2c-3a+4b+2c
=-7a+13b-5c
Kokain
= -6a+3b-9c+2a+6b+2c-3a+4b+2c= -7a+13b-5c

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