一,填空1 2X²*3xy=6X3Y2 6a²b*(-2ab)=-12a3b23 -3x²*（2xy+y²-2)=-6x3y-3x2y2+6x24 (1/3a²-3ab)*3/4ab²=1/4a3b2-9/4a2b35 (m+n)*(m-2n)=m2-mn-2n26 (3x+1)*(2x-3)=6x2-7x-37 若（x+a)...
一,填空1 2X²*3xy=2 6a²b*(-2ab)=3 -3x²*（2xy+y&sup
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