题目内容
计算(72x3y4-36x2y3+9xy2)÷(-9xy2)等于( )
A.-8x2y2+4xy-1 | B.-8x2y2-4xy-1 |
C.-8x2y2+4xy+1 | D.-8x2y2+4xy |
原式=72x3y4÷(-9xy2)-36x2y3÷(-9xy2)+9xy2÷(-9xy2)
=-8x2y2+4xy-1.
故选A.
=-8x2y2+4xy-1.
故选A.
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