Solution
Sum of roots in an equation : $$ax^2 + bx + c = 0$$ is $$-\frac{b}{a}$$
(A) : $$x^2 - 11x + 18 = 0$$
=> Sum of roots = $$-\frac{-11}{1} = 11$$
(B) : $$x^2 - 7x + 10 = 0$$
=> Sum of roots = $$-\frac{-7}{1} = 7$$
(C) : $$x^2 + 2x - 26 = 0$$
=> Sum of roots = $$-\frac{2}{1} = -2$$
(D) : $$x^2 + 5x - 6 = 0$$
=> Sum of roots = $$-\frac{5}{1} = -5$$
=> Ans - (A)
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