{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^2其中x=2先化简,
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![{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^2其中x=2先化简,](/uploads/image/z/3011074-34-4.jpg?t=%EF%BD%9B3x%5E2%28a%5E2%2Bb%5E2%29-3a%5E2b%5E2%2B3%5Bx%5E2%2B%28a%2Bb%29x%2Bab%5D%2A%5Bx%28x-a%29-b%28x-a%29%5D%7D%2F2x%5E2%E5%85%B6%E4%B8%ADx%3D2%E5%85%88%E5%8C%96%E7%AE%80%2C)
{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^2其中x=2先化简,
{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^2其中x=2先化简,
{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^2其中x=2先化简,
{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^2
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=3/2{x^2a^2+x^2b^2-a^2b^2+[(x^2+ab)^2-(a+b)^2x^2]}/x^2
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若x=2
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