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一元二次方程计算 (1)4X²+3X-1=0 (2)X²-3X-2=0 (3)X²+2X-
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计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=
x的三次方+3x²-4x-12(因式分解) x-1 分之X²-x-1计算
计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
计算:x^2-1/x^2+4x+4÷(x+10)×2x+4/x-1