计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
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计算(5x-2)(x-3)-(3x-1)(x-4)=(x+3)(x²+9)(x-3)=计算(5x-2)(x-3)-(3x-1)(x-4)=(x+3)(x²+9)(x-3)=计算(5
计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
原式=(x²-9)(x²+9)
=x四次方-81
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