解(y-3分之2y+y+3分之y)×y分之y²-9

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解(y-3分之2y+y+3分之y)×y分之y²-9解(y-3分之2y+y+3分之y)×y分之y²-9解(y-3分之2y+y+3分之y)×y分之y²-9原式=2y/(y-3

解(y-3分之2y+y+3分之y)×y分之y²-9
解(y-3分之2y+y+3分之y)×y分之y²-9

解(y-3分之2y+y+3分之y)×y分之y²-9
原式=2y/(y-3)×(y+3)(y-3)/y+y/(y+3)×(y+3)(y-3)/y
=2(y+3)+(y-3)
=2y+6+y-3
=3y+3

解:((2y/y-3)+(y/y+3))*(y^2-9)/y=(2y/y-3)*(y^2-9)/y+(y/y+3)*(y^2-9)/y=(2y/y-3)*((y-3)*(y+3)/y)+(y/y+3)*((y-3)*(y+3)/y)=2*(y+3)+(y-3)=3y+3