4x^3-4x^2y-(x-y)因式分解2.a^3+1/81(b^3) 3.x(x+4)+4

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4x^3-4x^2y-(x-y)因式分解2.a^3+1/81(b^3) 3.x(x+4)+4
4x^3-4x^2y-(x-y)因式分解
2.a^3+1/81(b^3) 3.x(x+4)+4

4x^3-4x^2y-(x-y)因式分解2.a^3+1/81(b^3) 3.x(x+4)+4
4x^3-4x^2y-(x-y)
=4x²(x-y)-(x-y)
=(x-y)（4x²-1）
=(x-y)(2x+1)(2x-1)

4x^3-4x^2y-(x-y)
=4x^2(x-y)-(x-y)
=(x-y)(4x^2-1)
=(x-y)(2x-1)(2x+1)

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