The voltage in an electrical circuit is multiplied by itself each time it is reduced. the voltage is 27/125 of a volt and it has been reduced three times. write the voltage in exponential form. what was the original voltage in the circuit?

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0