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数学
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计算[(x+2)^2-2x][(x-1)^2-5]
人气:399 ℃ 时间:2020-03-09 21:23:14
解答
[(x+2)^2-2x][(x-1)^2-5]=(x^2+2x+4)(x^2-2x-4)=[x^2+(2x+4)][x^2-(2x+4)]
=x^4-(2x+4)^2=x^4-4x^2-16x-16
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