please do #1-5 thx

variation of parameters u1'y1+u2'y2=0; u1'y1'+u2'y2'=f(x)

For Problems 1-22, use the variation-of-parameters method to find the general solution to the given differential equation. 1. y" - 6y' + 9y = 403x Inx, x> 0. 2. y" + 4y' + 4y =x-2e-2x, x> 0. 3. y" + 9y = 18 sec3(3x), |x|