Question

Please help with the second question below.The answers are A., B., D., and E.

Answer 1

Answer:

The answers A,B,D and E are verified.

Explanation:

  We have equation, x⁴ - 3 x² + 2 = 0

  Substituting  y = x²

  So equation is  y²- 3 y+ 2 = 0

   => (y-1)(y-2) = 0

   y = 1  or y = 2

So we have  x² = 1 or  x² = 2

 => x = 1 , x = -1 , $x=\sqrt{2}$ or $x=-\sqrt{2}$

So the answers are A,B,D and E.