Level:
Project ID:
9000028308
Accepted:
1
Solve the following equation.
\[
x^{4} - 20x^{2} + 99 = 0
\]
\(-\sqrt{11}\),
\(- 3\),
\(3\),
\(\sqrt{
11}\)
\(0\),
\(- 3 -\sqrt{17}\),
\(- 3 + \sqrt{17}\)
\(0\),
\(3 -\sqrt{17}\),
\(3 + \sqrt{17}\)
\(-\sqrt{17}\),
\(- 3\),
\(3\),
\(\sqrt{
17}\)