Question 683655
1/2x²+2x+3=0
2(1/2x²+2x+3)=0*2
x²+4x+6=0
x²+4x=-6           &#12304;(4/2)²=4&#12305;
x²+4x+4=-6+4       &#12304;completing the square&#12305;
&#65288;x+2&#65289;*&#65288;x+2&#65289; =-2
(x+2)² =-2
x=&#65288;+&#8730;-2&#65289;-2
x=(-&#8730;-2)-2