x^x+1.x^(x+2)(x+3)÷x²^(x+3).x^x(x+2)
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x
5
−6x
4
+9x
3
−x
(x
3
−3x
2
−x)(x
2
−3x+1)
=x(x
2
−3x−1)(x
2
−3x+1)
[x(x
2
−3x−1)][(x
2
−3x+1)]=x[((x
2
−3x)−1)((x
2
−3x)+1)]
=x[(x
2
−3x)
2
−1
2
]
=x(x
4
−6x
3
+9x
2
−1)
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