6, 7а - (1, 2а +0, 7a^3) = 6, 7а - 1, 2а - 0, 7a^3 = 5, 5а - 0, 7a^3
(5, 3x — x^2 + 8) +0, 5x^2 — (11, 8х + 3, 6х^2) = 5, 3x — x^2 + 8 + 0, 5x^2 - 11, 8х - 3, 6х^2 = - 4,1 х^2 - 6, 5x + 8
6, 7а - (1, 2а +0, 7a^3) = 6, 7а - 1, 2а - 0, 7a^3 = 5, 5а - 0, 7a^3
(5, 3x — x^2 + 8) +0, 5x^2 — (11, 8х + 3, 6х^2) = 5, 3x — x^2 + 8 + 0, 5x^2 - 11, 8х - 3, 6х^2 = - 4,1 х^2 - 6, 5x + 8