[(xy-2)(-xy-2)-4(xy-1)^2]除以(-xy),其中x=20,y=-25分之1
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![[(xy-2)(-xy-2)-4(xy-1)^2]除以(-xy),其中x=20,y=-25分之1](/uploads/image/z/12634393-49-3.jpg?t=%5B%28xy-2%29%28-xy-2%29-4%28xy-1%29%5E2%5D%E9%99%A4%E4%BB%A5%28-xy%29%2C%E5%85%B6%E4%B8%ADx%3D20%2Cy%3D-25%E5%88%86%E4%B9%8B1)
[(xy-2)(-xy-2)-4(xy-1)^2]除以(-xy),其中x=20,y=-25分之1
[(xy-2)(-xy-2)-4(xy-1)^2]除以(-xy),其中x=20,y=-25分之1
[(xy-2)(-xy-2)-4(xy-1)^2]除以(-xy),其中x=20,y=-25分之1
[(xy-2)(-xy-2)-4(xy-1)^2]除以(-xy)
=[-x²y²+4-4(x²y²-2xy+1)]÷(-xy)
=(-x²y²+4-4x²y²+8xy-4)÷(-xy)
=(-5x²y²+8xy)÷(-xy)
=5xy-8
=5×20×(-25分之1 )-8
=-4-8
=-12
[(xy-2)(-xy-2)-4(xy-1)²]/(-xy)
=[-(x²y²-4)-4(xy²-2xy+1)]/(-xy)
=(-5x²y²+8xy-1)/(-xy)
=5xy-8+1/xy
x=20,y=-25分之1 xy=20×(-1/25)=-4/5
原式=5×(-4/5)-8+(-5/4)=-4-8-5/4=-53/4
=[(-2+xy)(-2-xy)-4(xy-1)^2]除以(-xy)
=[(-2)²-(xy)²-4(x²y²-2xy+1)]/(-xy)
=(4-x²y²-4x²y²+8xy-4)/(-xy)
=-(-5x²y²+8xy)/(xy)
=5xy-8
(-3xy+2xy)-(4xy+xy)
3xy-4xy-(-2xy)
1.3xy -4xy-(2xy)
3xy-4xy-(-2xy)
(-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
3xy-4xy-(-2xy) 快啊,亲
3xy-3xy-xy+2yx
2xy.(-3xy)÷(xy)
2xy-xy-(-3xy)=
xy^2-2xy+2y-4