Question

solve the equation.

3x^-2 - 14x^-1 - 5 = 0

Answer 1

3x^-2 - 14x^-1 - 5 = 0
let x^-2=v^2,x^-1=v
3v^2 - 14v - 5 = 0, solving this quadratic equation
v=5, -1/3
now subs x=1/v =1/5 ans.....
and x=1/v=-3 ans.....