因式分解-x^2y+8xy^2-16y^3

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因式分解-x^2y+8xy^2-16y^3

因式分解-x^2y+8xy^2-16y^3
因式分解-x^2y+8xy^2-16y^3

因式分解-x^2y+8xy^2-16y^3
原式=-y(x^2-8xy+16y^2)
=-y(x-4y)^2

—y(x+4y)^2

原式=-y(x-4y)²

-x^2y+8xy^2-16y^3
=-x^2y+4xy^2+4xy^2-16y^3
=-x(xy-4y^2)+4y(4xy-16y^2)
=(xy-4y^2)(4y-x)
=y(x-4y)(4y-x)
=-y(x-4y)^2