Science:Math Exam Resources/Courses/MATH257/December 2011/Question 05 (a)/Hint 1

From UBC Wiki

Similar to question 2b of this exam, when using the method of separation of variables, we would like to write as a product of two solutions of a single variable. In question 2b, we wrote as but we need something slightly different this time (because there is no or anywhere in the equation!). How should we write as a product of two solutions of a single variable this time?