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= 2x kuadarat + 5x +2
2. (30x kuadrat - 18x - 10x + 6) - ( 6x kuadrat + 24x - 2x - 8) = 30x kuadrat - 18x - 10x + 6 - 6x kuadrat - 24x + 2x + 8
= 24x kuadrat - 6x + 14