The indicated function y₁(x) is a solution of the given differential equation. Use reduction of order or formula (5) in Section 4.2, e-SP(x) dx Y₂ = y ₁ (x) ·[ dx (5) y²(x) as instructed, to find a second solution y₂(x). y" + 2y' + y = 0; Y₁ = xe-x = Y2