(1) 2(x+3)² = x(x+3) (2) x²-2(根号5)+2=0(3) (x+1)²-3_其他解答

(1) 2(x+3)² = x(x+3) (2) x²-2(根号5)+2=0
(3) (x+1)²-3(x+1)+2=0.
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人气：125 ℃　时间：2020-06-11 08:00:40

解答

2(x+3)² = x(x+3) x²-2(根号5)+2=0
(x-(根号5））²=3
2（X+3）=x X-(根号5)=根号3
x=-3 X=根号5+根号3
(x+1)²-3(x+1)+2=0
（(x+1)-3/2）²=1/4
x+1-3/2=1/2
x=1