因式分解：4x^4+6x^2y-9y^4-9y^3
人气：329 ℃ 时间：2020-01-27 03:02:05
解答
4x^4+6x^2y-9y^4-9y^3=4x^4-9y^4 +6x²y-9y³=(2x²+3y²)(2x²-3y²)+3y(2x²-3y²)=(2x²-3y²)(2x²+3y²+3y)
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