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1. 3a - 2b + 3c + 10a + 6b - 2c = 13a + 4b + c
2. 6a² + 5a - 6 = ( 3a - 2 ) ( 2a + 3 )
= 3a-2b+3c+10a+6b-2c
*lalu kelompokkan* = 3a+10a-2b+6b+3c-2c
=13a+4b+c
2. gak tau ._.