填空两个[3a^2-( )]÷(-a)=-3a+2b( )·(-2xy)=4x^2y-6xy^2
2个回答
[3a^2-(2ab)]÷(-a)=-3a+2b
(-2x+3y)·(-2xy)=4x^2y-6xy^2
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计算:(1)2x 2 y•(-3xy)÷(xy) 2 (2)(-2a)•(3a 2 -a+3)(3)(x+3)(x+4)
A=4x2-2xy+4y2,B=3x2-6xy+3y2,且|x|=3,y2=16,|x+y|=1,求4A+[(2A-B)
一,填空1 2X²*3xy=2 6a²b*(-2ab)=3 -3x²*(2xy+y&sup
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A