<PRE><B>Question 428278</B>
1.X^2+4x+2=0 
X^2+4x = -2
X^2+4x+4 = -2+4
(x+2)(x+2) = 2
(x+2)^2 = 2
(x+2) = sqrt(2)
x = sqrt(2) - 2
.
2.X^2+8x=1
X^2+8x+16 = 1+16
(x+4)(x+4) = 17
(x+4)^2 = 17
(x+4) = sqrt(17)
x = sqrt(17) - 4
.
3.X^2+2=6x+4
X^2=6x+2
X^2-6x = 2
X^2-6x+9 = 2+9
(x-3)(x-3) = 11
(x-3)^2 = 11
(x-3) = sqrt(11)
x = sqrt(11) + 3


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