要过程(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0

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要过程(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0
要过程(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0
(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0

要过程(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0(1)x^3-729=0 (2)216x^3+1=0 (3)(x+5)^3+27=0 (4)(8-0.1x)^3+0.027=0
1.
x³-729=0
x³=9³
x=9
2.
216x³+1=0
(6x)³=-1
6x=-1
x=-1/6
3.
(x+5)³+27=0
(x+5)³=-27
(x+5)³=(-3)³
x+5=-3
x=-8
4.
(8-0.1x)³+0.027=0
(8-0.1x)³=-0.027
(8-0.1x)³=(-0.3)³
8-0.1x=-0.3
0.1x=8.3
x=83

(1)9 (2) -1/6 (3) -8 (4) 87