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因式分解x^4y^2-13x^2y+36
人气:334 ℃ 时间:2020-02-03 19:26:20
解答
=x^4y^2-2*(13/2)x^2y+(13/2)^2 - 25/4
=(x^2y-13/2)^2 - (5/2)^2
=(x^2y-4)(x^2y-9)
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