解方程 x²-9x-36=0 3(x-2)²-12=0 x²-4x+1=0 (x-1)(x+2)=70
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![解方程 x²-9x-36=0 3(x-2)²-12=0 x²-4x+1=0 (x-1)(x+2)=70](/uploads/image/z/332338-58-8.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+x%26%23178%3B-9x-36%3D0+3%EF%BC%88x-2%EF%BC%89%26%23178%3B-12%3D0+x%26%23178%3B-4x%2B1%3D0+%EF%BC%88x-1%EF%BC%89%EF%BC%88x%2B2%EF%BC%89%3D70)
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解方程 x²-9x-36=0 3(x-2)²-12=0 x²-4x+1=0 (x-1)(x+2)=70
解方程 x²-9x-36=0 3(x-2)²-12=0 x²-4x+1=0 (x-1)(x+2)=70
解方程 x²-9x-36=0 3(x-2)²-12=0 x²-4x+1=0 (x-1)(x+2)=70
解1:x²-9x-36=0;x²-9x-36=(X-12)*(x+3)=0,解得:x1=12,x2=-3.
解2:3(x-2)²=12;(x-2)²=4;x=2±2;解得:x1=4,x2=0.
解3:x²-4x+1=0;解得:x1=2+√3,x2=2-√3.
解4:(x-1)(x+2)=70;x²+x-72=(x+9)*(x-8)=0;解得:x1=-9,x2=8.