因式分解 x4-13x²y²+36y4

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因式分解 x4-13x²y²+36y4


x³-13x²y²+36y⁴
=(x²-4y²)(x²-9y²)
=(x+2y)(x-2y)(x+3y)(x-3y)

x4-13x²y²+36y4 =(X^2-4y^2)(X^2-9y^2)=(x+2y))(x-2y)(x+3y)(x-3y)