解方程 9(x-1)^3+72=0

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解方程 9(x-1)^3+72=0

9(x-1)³=-72
(x-1)³=-8
x-1=-2
∴x=-1

9(x-1)^3+72=0
(x-1)³=8
x-1=2
x=3

9(x-1)³+72=0
9(x-1)³=-72
(x-1)³=-8
x-1=-2
x=-1