Ah, thank you both! I've been looking at it, on the paper there's quite a gap between 'Given initial condition İ(0) = 0' and 'Solution is...', I was (obviously mistakenly) presuming there was a further (mathematical) step between solving the quadratic & the actual answer.
My apologies, I've...
Homework Statement
The current I(t) in an electrical circuit satisfies the second-order differential equation 2Ϊ + 3İ + I = 0.
Find the solution I(t) of this equation which also satisfies the initial conditions I(0) = 1, İ(0) = 0.
Homework Equations
a((d^2y)/(dx^2)) + b(dy/dx) + cy = 0...