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x^+4x+4y^=9…(1) x^+xy=0…(2) 對(2)x=0時,成立,對(1),x=0,y=1.5或-1.5 當x不為0時,由(2)得x=-y代入1得5y^-4y-9=0解得y=-1或y=1.8 所以共有四組解 x=0,y=1.5; x=0,y=-1.5; x=1,y=-1; x=-1.8,y=1.8; 希望對你有所幫助
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