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  ((3x-7)^2-(x+5)^2)/(4x-24).2,((x^2+1)^2-4x(x^2+1)+4x^2)/(x-1)^2计算((3x-7)^2-(x+5)^2)/(4x-24).2,((x^2+1)^2-4x(x^2+1)+4x^2)/(x-1)^2计算急

  ((3x-7)^2-(x+5)^2)/(4x-24).2,((x^2+1)^2-4x(x^2+1)+4x^2)/(x-1)^2计算

  ((3x-7)^2-(x+5)^2)/(4x-24).2,((x^2+1)^2-4x(x^2+1)+4x^2)/(x-1)^2计算急

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2020-05-1500:37
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彭志方

  ((3x-7)^2-(x+5)^2)/(4x-24).=(3x-7+x+5)(3x-7-x-5)/(4x-24)=(4x-2)(2x-12)/(4x-24)=4(2x-1)(x-6)/4(x-6)=2x-1((x^2+1)^2-4x(x^2+1)+4x^2)/(x-1)^2=[(x^2+1)-2]^2/(x-1)^2=(x^2-1)^2/(x-1)^2=(x-1)^2(x+1)^2/(x-1)^2...

2020-05-15 00:38:46
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