因式分解56x^3y+14x^2y^2-21xy^2

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因式分解56x^3y+14x^2y^2-21xy^2因式分解56x^3y+14x^2y^2-21xy^2因式分解56x^3y+14x^2y^2-21xy^256x^3y+14x^2y^2-21xy^2

因式分解56x^3y+14x^2y^2-21xy^2
因式分解56x^3y+14x^2y^2-21xy^2

因式分解56x^3y+14x^2y^2-21xy^2
56x^3y+14x^2y^2-21xy^2
=7xy(8x²+2xy-3y)

题目应该是这个吧
56x^3y+14x^2y^2-21xy^3
=7xy(8x²+2xy-3y²)
=7xy(2x-y)(4x+3y)

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