was just wondering how i'd go about using the method of undetermined coefficients to find a particular solution of
the only solution i've come up with seems too simple.
any help is greatly appreciated!
i donot know what are undetermined coefficients. but the solution to your equation will be ax^2/2+c1.x+c2 where c1 and c2 are "undetermined coefficients"(saying literally) which you can find out if some initial value is given.