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-2x^3y+2x^2y^2-1/2xy^3
a^2-8ab+16b^2-c^2-2c-1
人气:292 ℃ 时间:2020-06-25 00:57:47
解答
1.-2x^3y+2x^2y^2-1/2xy^3
=-2xy(x^2-xy+1/4y^2)
2.a^2-8ab+16b^2-c^2-2c-1
=(a-4b)^2-(c+1)^2
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