y³-2y²+y-2
先化简,在求值：6y-(y+2分之y+2-y分之y)除以y³-4y-2y²+8分之y,其中y=-2分之5先化简,在求值：6y-(y+2分之y+2-y分...
先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5
先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5 展开
先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5 展开
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6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y
=6y-[(2y-y²+2y+y²)/(4-y²)]÷y/(y-2)³
=6y+[4y/(y-2)(y+2)]÷y/(y-2)³
=6y+4(y-2)²/(y+2)
=(6y²+12y+4y²-16y+16)/(y+2)
=(10y²-4y+16)/(y+2)
=(10*25/4+4*5/2+16)/(-5/2+2)
=(125/2+10+16)/(-1/2)
=(125/2+26)/(-1/2)
=-125-52
=-177
=6y-[(2y-y²+2y+y²)/(4-y²)]÷y/(y-2)³
=6y+[4y/(y-2)(y+2)]÷y/(y-2)³
=6y+4(y-2)²/(y+2)
=(6y²+12y+4y²-16y+16)/(y+2)
=(10y²-4y+16)/(y+2)
=(10*25/4+4*5/2+16)/(-5/2+2)
=(125/2+10+16)/(-1/2)
=(125/2+26)/(-1/2)
=-125-52
=-177
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