In each of 1 through 6, determine whether the method of separation of variables can be used to replace the given partial differential equation by a pair of ordinary differential equations. If so, find the equations.uxx + uyy + xu = 0

Matrices REF + RREF Wednesday, September 7, 2016 3:07 PM Review Problem using Gaussian Elimination and Backward Substitution -2 6 -4 -6 -4 15 -2 0 5 -9 24 45 Remember for Gaussian Elimination, the goal is to put the matrix in REF To do this, make the first coefficient of the first row = 1 by multiplying by - 1/2 New Matrix 1 -3 2 3 -4 15 -2 0 5 -9 24 45 Next make all the numbers underneath the 1 we just made into zeros. This is done by multiplying the first row and adding it to another row 4R1 + R2 4 -12 8 12 New Matrix 1 -3 2 3 0 3 6 12 5 -9 24 45 Next do the same thin