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分解因式分不出来，我在matlab下试了一下，三个根如下，应该是题目出错了吧
x_1=4/3 - (77/108 - (11*432^(1/2))/432)^(1/3) - 11/(18*(77/108 - (11*432^(1/2))/432)^(1/3))
x_2=11/(36*(77/108 - (11*432^(1/2))/432)^(1/3)) + (77/108 - (11*432^(1/2))/432)^(1/3)/2 + 4/3 - (3^(1/2)*(11/(18*(77/108 - (11*432^(1/2))/432)^(1/3)) - (77/108 - (11*432^(1/2))/432)^(1/3))*i)/2
x_3=11/(36*(77/108 - (11*432^(1/2))/432)^(1/3)) + (77/108 - (11*432^(1/2))/432)^(1/3)/2 + 4/3 + (3^(1/2)*(11/(18*(77/108 - (11*432^(1/2))/432)^(1/3)) - (77/108 - (11*432^(1/2))/432)^(1/3))*i)/2
x_1=4/3 - (77/108 - (11*432^(1/2))/432)^(1/3) - 11/(18*(77/108 - (11*432^(1/2))/432)^(1/3))
x_2=11/(36*(77/108 - (11*432^(1/2))/432)^(1/3)) + (77/108 - (11*432^(1/2))/432)^(1/3)/2 + 4/3 - (3^(1/2)*(11/(18*(77/108 - (11*432^(1/2))/432)^(1/3)) - (77/108 - (11*432^(1/2))/432)^(1/3))*i)/2
x_3=11/(36*(77/108 - (11*432^(1/2))/432)^(1/3)) + (77/108 - (11*432^(1/2))/432)^(1/3)/2 + 4/3 + (3^(1/2)*(11/(18*(77/108 - (11*432^(1/2))/432)^(1/3)) - (77/108 - (11*432^(1/2))/432)^(1/3))*i)/2
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