exam Maths Puzzle Numerical Ability

can you please show me the steps on soloving this problem and its solution thank you!

x^2+24x+63=

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A ski lift has a seat suspended from a wire above. Three skiers with masses of 70 kilograms, 82 kilograms, and 20 kilograms are riding the lift. The seat itself has a mass of 17 kilograms. What is the total force exerted on the wire above? the length of a rectangle is twice its width. if the perimeter is 60, find the dimensions of the rectangle.