Solve Equations That Are Quadratic in Form
Solve the Equation $$x ^ { 1 / 2 } - 19 x ^ { 1 / 4 } + 90 = 0$$

Multiple Choice

Solve Equations That Are Quadratic in Form
Solve the equation by making an appropriate substitution.
- $$x ^ { 1 / 2 } - 19 x ^ { 1 / 4 } + 90 = 0$$

A) $\{ 10,000,6561 \}$
B) $\{ 100,81 \}$
C) $\{ - 10 , - 9 \}$
D) $\{ 10,9 \}$