P ^ 2 q ^ 2 July 8, 2019 16 32 64 128 P ^ 2 q ^ 2 - 6pqr + 9r ^ 2 P 2 q 2 P 2 q 2 formula P 2 q 2 1 P 2 q 2 pq P 2 q 2 z P 2 q 2 3 P 2 q 2 r P 2 q 2 x y P 2 q 2 y qz P 2 q 2 npq P 2 q 2 1 partial differential equation P 2 q 2 4 P 2 q 2 x pz P 2 q 2 factorise
