exam Maths Puzzle Numerical Ability

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solve the quadratic equation by completing the square

x^2+12x+30=0

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exam Other Question

A rectangle has a perimeter of 39 centimeters. The retangle is dilated by a scale factor of 1/2 to prodice a new rectangle. What is the perimeterof the new rectangle?

a) 19.5
b Find the area of the rectangle. Top side= square root of 3 + square root of 5 and the right side= square root of 3 + square root of 5