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2x^2+xy-4y^2 因式分解
人气:363 ℃ 时间:2019-12-01 10:31:33
解答
=2x^2+xy+1/8y^2-33/8y^2
=(根号2x+根号2/4y)^2-33y^2/8
=(根号2x+根号2y/4+根号66y/4)(根号2x+根号2y/4-根号66y/4)
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