求采纳哦，谢谢
2（x^2+4x+4）=1+82（x+2）^2=9x+2=3倍2分之根号2x1=3倍2分之根号2-2x+2=-3倍2分之根号2x2=-3倍2分之根号2-2
X1,X2＝[-8±√(8²-4×2×(-1))]/2×2＝(-8±6√2)/4X1≈0.1213X2≈-4.1213
