[3a²-﹙ ﹚]÷﹙-a﹚=-3a=2b是[3a²-﹙ ﹚]÷﹙-a﹚=-3a+2b

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[3a²-﹙﹚]÷﹙-a﹚=-3a=2b是[3a²-﹙﹚]÷﹙-a﹚=-3a+2b[3a²-﹙﹚]÷﹙-a﹚=-3a=2b是[3a²-﹙﹚]÷﹙-a﹚=-3a+

[3a²-﹙ ﹚]÷﹙-a﹚=-3a=2b是[3a²-﹙ ﹚]÷﹙-a﹚=-3a+2b
[3a²-﹙ ﹚]÷﹙-a﹚=-3a=2b
是[3a²-﹙ ﹚]÷﹙-a﹚=-3a+2b

[3a²-﹙ ﹚]÷﹙-a﹚=-3a=2b是[3a²-﹙ ﹚]÷﹙-a﹚=-3a+2b
[3a²-﹙2ab﹚]÷﹙-a﹚=-3a+2b