作业帮(2x-1)²-9x²＝0
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/30 19:27:36
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(2x-1)²-9x²＝0
(2x-1)²-9x²＝0
(2x-1)²-9x²＝0
解方程(2x-1)²-9x²=0
(2x-1+3x)(2x-1-3x)=(5x-1)(-x-1)=0
故x₁=1/5；x₂=-1.
(2x-1)^2-9x^2=0
(2x-1+3x)(2x-1-3x)=0
(5x-1）(-x-1)=0
x1=1/5 x2=-1
4x－4x+1-9x=0
-5x-4x+1=0
5x+4x-1=0
(5x-1)(x+1)=0
x=1/5或者x=-1
（2x-1）2-9x2=0
4x2-4x+1-9x2=0
-5x2-4x+1=0
用求根公式可得x1=-1
x2=1/5
x=0.2或-1
x=1,-1,0.2,-0.2