(1)x³+125分之216=0 (2)x²=0.16
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![(1)x³+125分之216=0 (2)x²=0.16](/uploads/image/z/50675-59-5.jpg?t=%EF%BC%881%EF%BC%89x%26%23179%3B%2B125%E5%88%86%E4%B9%8B216%3D0+%EF%BC%882%EF%BC%89x%26%23178%3B%3D0.16)
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(1)x³+125分之216=0 (2)x²=0.16
(1)x³+125分之216=0 (2)x²=0.16
(1)x³+125分之216=0 (2)x²=0.16
x³=-216/125
x=-6/5
x²=0.16
x=-0.4,x=0.4
(1)x³+125分之216=0
x³=-125分之216
x=-5/6
(2)x²=0.16
x1=0.4
x2=-0.4