Помогите пожалуйста
х(в кубе) - 13х - 12 = 0
3х - 13х - 12 = 0
-10х - 12 =0
-10х = 0+12
-10х = 12
х = 12: (-10)
х = -1,2
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х(в кубе) - 13х - 12 = 0
3х - 13х - 12 = 0
-10х - 12 =0
-10х = 0+12
-10х = 12
х = 12: (-10)
х = -1,2