Given that the equation: x¹⁰ + (13x - 1)¹⁰ = 0 has ten complex roots:
R1, R1, R2, R2, R3, R3, R4, R4, R5 and R5
where the bolded form represents complex conjugation.

Determine the value of:

(R1*R1)^-1+( R2*R2) ^-1+(R3*R3) ^-1+(R4*R4) ^-1+( R5*R5) ^-1