Find the Difference!
Algebra
Level
2
\(x\) is a positive real number which satisfies
\[ \sqrt {11x^2-21x+31}+\sqrt {11x^2-21x-9}=8. \]
What is the value of
\[ \sqrt {11x^2-21x+31}-\sqrt {11x^2-21x-9} ? \]
by
Muh. Amin Widyatama