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(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
有谁知道数学通分X-Y/2X+2Y与XY/(X+Y)怎么做?
7x²y-2xy²+2yx²+y²x-3xy²怎么做?是合并同类项在算
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x^2-xy-6y^2+3xy+y+2
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
(-3x^y+2xy)-( )=4x^+xy