(x+2)方=2x+4x²+4x+4-2x-4=04和4约掉就为0 x²+2x=0提取公因式 x(x+2)=0x=0或x+2=0x1=0或x2=-2
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(x+2)方=2x+4x²+4x+4-2x-4=04和4约掉就为0 x²+2x=0提取公因式 x(x+2)=0x=0或x+2=0x1=0或x2=-2
(x+2)方=2x+4
x²+4x+4-2x-4=0
4和4约掉就为0 x²+2x=0
提取公因式 x(x+2)=0
x=0或x+2=0
x1=0或x2=-2
(x+2)方=2x+4x²+4x+4-2x-4=04和4约掉就为0 x²+2x=0提取公因式 x(x+2)=0x=0或x+2=0x1=0或x2=-2
化简得x=2x^2
对,但还有更简单的方法
是对的。按照答案的规范的话,应该是x=0或者x=-2