What is the integer solution of the equation 2x ^ 2-3xy-2y ^ 2-98 = 0

What is the integer solution of equation 2x ^ 2-3xy-2y ^ 2-98 = 0 = > (x-2y) (2x + y) = 98 = 2 * 7 * 7x, y, not all even numbers? Let x-2y = k, 2x + y = m get 5x = K + 2m, that is, K + 2m divide 5 only: k = 98, M = 1, k = - 98, M = - 1K = 2, M = 49K = - 2, M = - 49K = 7, M = 14K = - 7, M = - 14 get (20,58) (- 20, - 58) (20,9) (- 20

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