Find All Real Solutions $x = \sqrt { \frac { - 1 + \sqrt { 17 } } { 2 } }$

Find all real solutions. x ⁴ + x ² - 4 = 0

A) $x = \sqrt { \frac { - 1 + \sqrt { 17 } } { 2 } }$
B) $x = \sqrt { \frac { 1 - \sqrt { 13 } } { 2 } }$
C) $x = \pm \sqrt { \frac { 1 - \sqrt { 13 } } { 2 } }$
D) $x = \pm \sqrt { \frac { - 1 \pm \sqrt { 17 } } { 2 } }$
E) $x = \pm \sqrt { \frac { - 1 + \sqrt { 17 } } { 2 } }$

Correct Answer:

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