已知等腰三角形的边长x满足2(x-3)2=x(x-3),求这个等腰三角形的周长.
已知等腰三角形的边长x满足2(x-3)2=x(x-3),求这个等腰三角形的周长.
数学人气:749 ℃时间:2019-11-14 10:44:03
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2(x-3)2-x(x-3)=0,(x-3)(2x-6-x)=0,x-3=0或2x-6-x=0,所以x1=3,x2=6,当等腰三角形的边长都为3时,三角形周长为9;当等腰三角形的边长都为6时,三角形周长为18;当等腰三角形的边长3、6、6时,三角形周长...
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