Solve Equations That Are Quadratic in Form
Solve the Equation $$x ^ { 4 } + 2 x ^ { 2 } - 24 = 0$$

Multiple Choice

Solve Equations That Are Quadratic in Form
Solve the equation by making an appropriate substitution.
- $$x ^ { 4 } + 2 x ^ { 2 } - 24 = 0$$

A) $\{ - 2,2 , - \mathrm { i } \sqrt { 6 } , \mathrm { i } \sqrt { 6 } \}$
B) $\{ - \sqrt { 6 } , \sqrt { 6 } , - 2 i , 2 i \}$
C) $\{ - 4,6 \}$
D) $\{ 2 , i \sqrt { 6 } \}$