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一元二次方程的一般形式是ax^2+bx+c=0(a≠0)x^2表示x的平方 所以 3X方+1=6x化簡為3x^2-6x+1=0 (3x-2)(x+1)=x(2x-1) 3x^2-2x+3x-2=2x^2-x 3x^2-2x^2-2x+3x+x-2=0 x^2+2x-2=0
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