分解因式X2-y-y3(x的平方减y再减y的立方)!学艺不精!

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分解因式X2-y-y3(x的平方减y再减y的立方)!学艺不精!
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分解因式X2-y-y3(x的平方减y再减y的立方)!学艺不精!
分解因式X2-y-y3(x的平方减y再减y的立方)!学艺不精!

分解因式X2-y-y3(x的平方减y再减y的立方)!学艺不精!
x2-y-y3
=x2-1-y-y3+1
=(x2-1)-(y3-1)-y
=(x+1)(x-1)-(y-1)(y2+y+1)-y

x2-y-y3

=x2-1-y-y3+1

=(x2-1)-(y3-1)-y

=(x+1)(x-1)-(y-1)(y2+y+1)-y    不对   没达到分解的目的。继续!11