Hi folks,

p(x,y), q(x,y) and f(x,y) are known functions and p(x,y) is positive and continuously diferentiable. Write out the following in co-ordinate form and determine whether its hyperbolic, parabolic or elliptic.

Here is my attempy to write it in co-ordinate form...I dont think its right

Given

Doesnt look right and I dont know how you legitimately remove i and j etc..thanks