用直接开平方法解方程(x-1)²=4 x²+3=28 (2x+根号5)(2x-根号5)=12分之1(3x-1)²-8=0 (2x-1)²-9(x+2)²=0
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![用直接开平方法解方程(x-1)²=4 x²+3=28 (2x+根号5)(2x-根号5)=12分之1(3x-1)²-8=0 (2x-1)²-9(x+2)²=0](/uploads/image/z/544593-57-3.jpg?t=%E7%94%A8%E7%9B%B4%E6%8E%A5%E5%BC%80%E5%B9%B3%E6%96%B9%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%88x-1%EF%BC%89%26%23178%3B%3D4+x%26%23178%3B%2B3%3D28+%EF%BC%882x%2B%E6%A0%B9%E5%8F%B75%EF%BC%89%EF%BC%882x-%E6%A0%B9%E5%8F%B75%EF%BC%89%3D12%E5%88%86%E4%B9%8B1%EF%BC%883x-1%EF%BC%89%26%23178%3B-8%3D0+%EF%BC%882x-1%EF%BC%89%26%23178%3B-9%EF%BC%88x%2B2%EF%BC%89%26%23178%3B%3D0)
用直接开平方法解方程(x-1)²=4 x²+3=28 (2x+根号5)(2x-根号5)=12分之1(3x-1)²-8=0 (2x-1)²-9(x+2)²=0
用直接开平方法解方程
(x-1)²=4 x²+3=28 (2x+根号5)(2x-根号5)=1
2分之1(3x-1)²-8=0 (2x-1)²-9(x+2)²=0
用直接开平方法解方程(x-1)²=4 x²+3=28 (2x+根号5)(2x-根号5)=12分之1(3x-1)²-8=0 (2x-1)²-9(x+2)²=0
(x-1)²=4
x-1=±√4
x-1=±2
x1=3,x2=-1
x²+3=28x²=25
x=±5
(2x+√5)(2x-√5)=1
4x^2-5=1
4x^2=6
x^2=3/2
x=±√6 /2
1/2(3x-1)²-8=0
(3x-1)²=16
3x-1=±4
x1=5/3,x2=-1
(2x-1)²-9(x+2)²=0
(2x-1)²=9(x+2)²
2x-1=±3(x+2)
2x-1=3x+6或2x-1=-3x-6
x1=1,x2=-7