
Parviz F. answered 02/17/14
Tutor
4.8
(4)
Mathematics professor at Community Colleges
- X^2 + 2X - 4 =0
- ( X^2 - 2x + 4 ) = 0
-( X^2 -2X +1 + 4 -1 ) =0
- ( ( X - 1) ^2 + 3 ) =0
-[ ( X - 1 )^ 2 = -3 ] = 0
1 +i < X < 1 +2 i 1 -i <X < 1-2i
Note: 1 < √3 < 2