用因式分解解方程:9(x-1)²-(x+2)²=0x²+10x+9=0
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![用因式分解解方程:9(x-1)²-(x+2)²=0x²+10x+9=0](/uploads/image/z/1244456-8-6.jpg?t=%E7%94%A8%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A9%EF%BC%88x-1%EF%BC%89%26%23178%3B-%EF%BC%88x%2B2%EF%BC%89%26%23178%3B%3D0x%26%23178%3B%2B10x%2B9%3D0)
用因式分解解方程:9(x-1)²-(x+2)²=0x²+10x+9=0
用因式分解解方程:9(x-1)²-(x+2)²=0
x²+10x+9=0
用因式分解解方程:9(x-1)²-(x+2)²=0x²+10x+9=0
9(x-1)²-(x+2)²=0
9(x-1)²=(x+2)²
3(x-1)=x+2或3(x-1)=-x-2
3x-3=x+2或3x-3=-x-2
2x=5或4x=1
x=5/2或x=1/4