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12x pangkat2 - 24xy pangkat2 - 12xy pangkat2 + 24xy pangkat4 = 12x pangkat2 - 36xy pangkat2 + 24xy pangkat 4
2) 6x - 12x + 4x -8 = -6x + 4x - 8 = -2x - 8
3) 5ab+2bc-d+3ab-2bc+6d= 8ab-bc+5d
4) 2a+13 - 3a+12b-9 = -1a+12b-22
5) (5x-y) (5x-y) = 25x pangkat2 - 5xy - 5xy + ypangkat2 = 25x pangkat2 - 10xy + ypangkat2
maaf kalo ada kesalahan atau caranya gajelas/?