exam Maths Puzzle Numerical Ability

(3/4-2/3)+(1/2+1/3)

What is the dominator of this fraction and why?

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exam Other Question

express the sum of 4x^2-3x+5 and (x-3)(x-2) as a trinomial. MY QUESTION: if i do this correctly, would the answer be -3x+5x^2+11? find three consecutive integers such that 3 times the sqaure of the first exceeds the product of the other two by 25