(x-1)2(x2-5)=0 急
问题描述:
(x-1)2(x2-5)=0 急
答
(x-1)^2(x^2-5)=0
(x-1)^2(x +根号5) (x - 根号5) = 0
所以 X1 =1 X2 =根号5 X3= 负根号5