book Maths Puzzle Numerical Ability

find x if xsquared=2x+5

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book Other Question

Solve all real and imaginary solutions: 1/X + 1(X-1) = 1/4 The distance an object falls is directly proportional to the square of the time it has been falling. After 6 seconds it has fallen 1296 feet. How long will it take to fall 2304 feet? I figured 1296 = x(6)square but not able to complete.