用两种方法解方程324XX30(X-3)2+4X(X-3)=0(x-3)[(x-3)+4x]=0(x-3)(5x-3)=0x1=0,x2=3/5x2-6x+9+4x2-12x=05x2-18x+9=0(x-3)(5x-3)=0x1=3,x2=3/5(x-3)+4x(x-3)=0解:x-3+4x2-12x=04x2-11x-3=0(4x+1)(x-3)=04x+1=0或x-3=0x=-1/4或x=3仅供参考,满意采纳,不懂追问2,保卫萝卜2第9关视频攻略魔法球与瓶子炮塔的完美接替在保卫萝卜2第9关图文攻