On hyperbola x ^ 2 / 16-y ^ 2 / 9 = 1, if the distance from a point P to a focus is 12, then the distance from point P to another focus is?

On hyperbola x ^ 2 / 16-y ^ 2 / 9 = 1, if the distance from a point P to a focus is 12, then the distance from point P to another focus is?

The two focal points are F1 and F2, according to the definition of hyperbola
"|pf1 | - |pf2 | = 8, that is: |12 - |pf2 | = 8,
When p is on the right branch of hyperbola, | Pf1 | = 12, | PF2 | = 12-8 = 4;
When p is on the left branch of hyperbola, | Pf1 | = 12, | PF2 | = 12 + 8 = 20. "