(x-1)²-4=0

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(x-1)²-4=0(x-1)²-4=0(x-1)²-4=0x等于3或-1很简单呀因为(x-1)²≥0,(x-1)²-4=0,所以(x-1)²

(x-1)²-4=0
(x-1)²-4=0

(x-1)²-4=0
x等于3或-1

很简单呀

因为(x-1)²≥0,(x-1)²-4=0,所以(x-1)²=4,x=3或-1