6x^2 -6x - 12,设f'(x) = 0 ,怎么求得x = -1 或 x = 怎么计算的?

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6x^2-6x-12,设f''(x)=0,怎么求得x=-1或x=怎么计算的?6x^2-6x-12,设f''(x)=0,怎么求得x=-1或x=怎么计算的?6x^2-6x-12,设f''(x)=0,怎么求得x=

6x^2 -6x - 12,设f'(x) = 0 ,怎么求得x = -1 或 x = 怎么计算的?
6x^2 -6x - 12,设f'(x) = 0 ,怎么求得x = -1 或 x = 怎么计算的?

6x^2 -6x - 12,设f'(x) = 0 ,怎么求得x = -1 或 x = 怎么计算的?
f(x)=0能解出两个值,导数=0只有一个值