book Maths Puzzle Numerical Ability

determine the constant that should be added to the binomial so that it becomes a perfect square trinomial. factor the trinomial. x^-5x

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book Other Question

find the inclination of the line 3x-4y=6 to the nearest degree show that the sum of the first N even natural numbers is equal to (1+1/N) times the sum of the first N odd natural numbers.