XX-YY/(X-Y)(X-Y)约分

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XX-YY/(X-Y)(X-Y)约分
XX-YY/(X-Y)(X-Y)约分

XX-YY/(X-Y)(X-Y)约分
XX-YY/(X-Y)(X-Y)
=(x^2-y^2)/(x-y)(x-y)
=(x+y)(x-y)/(x-y)(x-y)
=(x+y)/(x-y)

(XX-YY)/(X-Y)(X-Y)
=(x+y)(x-y)/(x-y)(x-y)
=(x+y)/(x-y)

对了

XX-YY/(X-Y)(X-Y)约分 xx-yy-x-y 因式分解 (x-y)(x+y)(xx-yy)=? x y x+yy x+y xx+y x y x y x+yy x+y xx+y x y [2x-(x+y)(x-y)](yy-xx) 已知2x=3y,求xy/xx+yy-yy/xx-yy的值用行列式性质计算下列行列式x y x+yy x+y xx+y x y xx+2x+yy+6y+10=0求xx+yy的值已知xx+yy+4x-6y+13=0,求（xx-2x）/xx+3yy的值. 因式分解：xx-2x-2yy+4y-xy xx-2xy+yy+4x-4y+4 分解因式：x-y-xx+2xy-yy+2 xx+4xy+yy-2x-4y+6 因式分解 x,+y=5 xy=3 求xx+yy xx+12*12=yy(y-x=2) 数学题XX*YY=ZXXZ中X,Y,Z各是几 x-y=3,(x+y)(x+y)=25,求xy/xx+yy的值?