⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1 ⒉1/2ab-5⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1⒉1/2ab-5aC-(3ac b)+(3aC-4a C),其中a=-1,b=2,C=-2
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⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1 ⒉1/2ab-5⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1⒉1/2ab-5aC-(3ac b)+(3aC-4a C),其中a=-1,b=2,C=-2
⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1 ⒉1/2ab-5
⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1
⒉1/2ab-5aC-(3ac b)+(3aC-4a C),其中a=-1,b=2,C=-2
⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1 ⒉1/2ab-5⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1⒉1/2ab-5aC-(3ac b)+(3aC-4a C),其中a=-1,b=2,C=-2
(-3xy+2xy)-(4xy+xy)
3xy-4xy-(-2xy)
3xy-4xy-(-2xy)
xy
3xy-3xy-xy+2yx
4xy+6xy-3xy=?
1.3xy -4xy-(2xy)
2xy.(-3xy)÷(xy)
2xy-xy-(-3xy)=
(-4xy^3)×(-xy)+(-3xy^2)^2
(-3xy^2)^2+(-4xy^3)*(-xy)=多少
(-4xy^3)*(-xy)+(-3xy^2)^2
(3xy^2)^2+(-xy^3)(4xy)
计算-xy-(4z-2xy)-(3xy-4z)
-xy(4z-2xy)-(3xy-4z) 化简
计算:3xy-4xy-(-2xy)要过程
(1)3xy-4xy-(-2xy)
3xy-4xy-(-2xy)的解法