作业帮[(x-3y)^2-(x-y)(x+2y)-11y^2除(-y)其中x=-1/6,y=-2013/2014
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[(x-3y)^2-(x-y)(x+2y)-11y^2除(-y)其中x=-1/6,y=-2013/2014
[(x-3y)^2-(x-y)(x+2y)-11y^2除(-y)其中x=-1/6,y=-2013/2014
[(x-3y)^2-(x-y)(x+2y)-11y^2除(-y)其中x=-1/6,y=-2013/2014
原式=(x²-6xy+9y²-x²-xy+2y²-11y²)÷(-y)
=(-7xy)÷(-y)
=7x
=7×(-1/6)
=-7/6
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