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5x3+2x 6x3+1 6x3+2x 6x2+2x
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2 5 3 4 6 1 2 5 3 4 1 6 2 6 5 4 1 3 2 6 4 5 3 1
m2﹣3m+4 m2﹣3m+2 m2﹣7m+2 m2﹣7m+4
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5x3+2x 6x3+1 6x3+2x 6x2+2x
﹣3﹣2=﹣5 ﹣|2|=2 1÷(﹣3)= ﹣2×3=6