exam Maths Puzzle Numerical Ability

sqrt(x + 4) + sqrt(x - 1) = 5

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exam Other Question

What is the function which would intersect the y-axis 2 positions up (vertical) from the function f(x)=x^2? a rectangular swimming pool is 2 m longer than it is wide.if the width is decreased by 3m, and the length is increased by 4m the area remains the same as the original area.find the original dimensions of the pool?