136- In the ellipse $5x^2 - 16y + 18x - 16y^2 = 5$, the sum of the focal radii of every point on it from its two foci is: (1) $4\sqrt{2}$ (2) $6$ (3) $4\sqrt{3}$ (4) $8$
\textbf{136-} In the ellipse $5x^2 - 16y + 18x - 16y^2 = 5$, the sum of the focal radii of every point on it from its two foci is:
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(1) $4\sqrt{2}$ \hfill (2) $6$ \hfill (3) $4\sqrt{3}$ \hfill (4) $8$
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