exam Maths Puzzle Numerical Ability

how do you complete the square? x^2+10x+24=0

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exam Other Question

A football is kicked into the air and follows the path defined by h=-2x^2+16x, where x is the time in seconds and h is the height in metres.What is the maximum height reached by the football? Simplify

y 0power x -8power/x -7power z((ytpower)-2power/(z 0power)9power - x 11power/y 4power)