Resultant of two vectors `vec F 1` and `vec F 2` is of magnitude `vec p . If vec F_2` is reversed then resultant is of magnitude Q. what is the value of `P^2 +Q^2`

Options

A. `F_1^2+F_2^2`
B. `F_1^2-F_2^2`
C. `2(F_1^2-F_2^)`
D. `2 (F_1^2+F_2^2)`

Answer

A