xy[4xy-2(xy+1/2x的2次方y)]
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xy[4xy-2(xy+1/2x的2次方y)]xy[4xy-2(xy+1/2x的2次方y)]xy[4xy-2(xy+1/2x的2次方y)]xy[4xy-2(xy+1/2x的2次方y)]=xy[4xy-
xy[4xy-2(xy+1/2x的2次方y)]
xy[4xy-2(xy+1/2x的2次方y)]
xy[4xy-2(xy+1/2x的2次方y)]
xy[4xy-2(xy+1/2x的2次方y)]
=xy[4xy-2xy-x的2次方y]
=xy[2xy-x²y]
=2x²y²-x³y²
xy[4xy-2(xy+1/2x的2次方y)]
2xy(5xy的2次方+3xy-1)
2xy(5xy的2次方+3xy-1)
(-3xy+2xy)-(4xy+xy)
[(xy-2)2次方-(-xy-1)(xy-4)]除(-3分之1xy)
(xy^2)^m+1次方/xy^2
(-1/2xy的二次方)-1/6x(xy的三次方)的二次方
3(x的2次方y+xy)-4(xy-2x的2次方y)-(-xy)化简
(-1/2*xy)*(4x-2xy的三次方+1)计算
(2xy的平方)的3次方-4xy(2x的平方y的5次方+xy)
-3(2x的2次方-xy)+4(x的2次方+xy-6)
-3(2x的2次方-xy)+4(x的2次方+xy-6)
4X的2次方+3XY-X的二次方-3XY+9 先化简 ,求值
(3x的2次方y-xy的2次方+1/2xy)/(-1/2xy)=?
速求;((xy+1)(xy-2)-2x的二次方y的二次方+2)除以(xy)=?
已知(x+1)的2次方+ly-1l=0,求2(xy-5xy的2次方)-(3xy的二次方-xy)的值
已知(x+1)的二次方+/y-1/=0,求2(xy-5xy的二次方)-(3xy的二次方-xy)的值
(2x的2次方-3xy+4y的2次方)×(-xy)