x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)化简完是什么

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x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)化简完是什么

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)
=x(x+2)(x-2)-(X+3)(X-1)(X-2)-2X(X-2)
=(X-2)(X^2+2X-X^2-2X+3-2X)
=(X-2)(3-2X)
=-2X^2+7X-6

-2(x)的平方+7x-6

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)
=x(x+2)(x-2)-(x+3)(x-1)(x-2)-2x(x-2)
=(x-2)(x²+2x-x²-2x+3-2x)
==(x-2)(3-2x)

(X-2)(3-2X)

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)
=x(x+2)(x-2)-(x+3)(x-1)(x-2)-2x(x-2)
=x(x-2)(x+2-2)-(x²+2x-3)(x-2)
=(x-2)[x²-(x²+2x-3)]
=(x-2)(3-2x)
=-2x²+7x-6

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)化简完是: - 2x^2 + 7x - 6

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)
=(x^3 - 4x)-(x^3 - 3x + 2x + 3x^2 -9x +6)-(2x^2 - 4x) (各乘式项相乘)
= x^3 - 4x ...

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x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)化简完是: - 2x^2 + 7x - 6

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)
=(x^3 - 4x)-(x^3 - 3x + 2x + 3x^2 -9x +6)-(2x^2 - 4x) (各乘式项相乘)
= x^3 - 4x - x^3 + 3x - 2x - 3x^2 + 9x - 6 - 2x^2 + 4x (去括号)
= - 2x^2 + 7x - 6 (合并同类项)

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