计算:(16-x^4)/(x^2+4)/(x+2)
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计算:(16-x^4)/(x^2+4)/(x+2)计算:(16-x^4)/(x^2+4)/(x+2)计算:(16-x^4)/(x^2+4)/(x+2)原式=-(x²+4)(x²-4
计算:(16-x^4)/(x^2+4)/(x+2)
计算:(16-x^4)/(x^2+4)/(x+2)
计算:(16-x^4)/(x^2+4)/(x+2)
原式=-(x²+4)(x²-4)/[(x²+4)(x+2)]
=-(x²+4)(x+2)(x-2)/[(x²+4)(x+2)]
=-(x-2)
=-x+2
(16-x^4)/(x^2+4)/(x+2)
=(4-x²)(4+x²)/(x²+4)/(x+2)
=(4-x²)/(x+2)
=(2+x)(2-x)/(x+2)
=2-x
不知道
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