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因式分解①a²+10+25
②m²-12mn+36n²
③xy³-2x²y²+x³y
人气:456 ℃ 时间:2020-02-04 13:28:36
解答
解1a^2+10a+25=(a+5)^2
m^2-12mn+36n^2=(m-6n)^2
xy^3-2x^2y^2+x^3y
=xy(y^2-2xy+x^2)
=xy(x-y)^2
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