Solve by Making a U-Substitution
- $x^{4}-6 x^{2}+8=0$ A) $\{2, \sqrt{2}\}$ B) $\{ \pm 2, \pm 2 \sqrt{2}\}$

Multiple Choice

Solve by making a u-substitution
- $x^{4}-6 x^{2}+8=0$

A) $\{2, \sqrt{2}\}$
B) $\{ \pm 2, \pm 2 \sqrt{2}\}$
C) $\{ \pm 2, \pm 2\}$
D) $\{ \pm 2, \pm \sqrt{2}\}$