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35 . We have, 2 x^{2} + 5 x + 17, - 15 + 9 - 9 x^{2}, 15 x Adding above expressions we get, 2 x^{2} + 5 x + 17 + (- 15) + 9 - 9 x^{2} + 15 x = - 7 x^{2} + 20 x + 11 36 . We have, 45 y^{2} - 16 y + 14 and 50 y^{2} - 25 y + 20 Now subtracting the expression : 50 y^{2} - 25 y + 20 - (45 y^{2} - 16 y + 14) = 50 y^{2} - 25 y + 20 - 45 y^{2} + 16 y - 14 = 5 y^{2} - 9 y + 6

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