book Maths Puzzle Numerical Ability

{(x+2)-y}{(X+2)+y}

is this a perfect square

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book Other Question

Diane can paint a house in 8 hours. Anne can paint a house in 10 hours. What is the fraction that they paint the house together in 2 hours? how do you get the x and y varibles in this problem
4x - 3y = 12
x + 2y = 14