已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)
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已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)(5x+
已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)
已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)
已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)
(5x+3xy-5y)÷(x-2xy-y)
=(-15xy+3xy)/(-3xy-2xy)
=-12/(-5)
=2.4
将后面式子中有关于y-x的项以xy代换
原式=(-15xy+3xy)/(-3xy-2xy)=-12xy/-5xy=2.4
将条件y-x=3xy代入式中可化简成4(x-y)/(x-y-2xy),再将x-y=-3xy代入化简式中得到结果12/5
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