若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为多少

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若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为多少若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为多少若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为

若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为多少
若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为多少

若-x^2y=2,则-xy{x^5y^2-x^3y+2x}的值为多少
-x^2y=2
x^2y=-2
-xy{x^5y^2-x^3y+2x}
=-x^6y^3+x^4y^2-2x^2y
=-(x^2y)^3+(x^2y)^2-2x^2y
=8+4+4
=16

原式=-x^6y^4+x^4y²-2x²y
=-(x²y)³+(x²y)²-2x²y
=-8+4-4
=-8

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