exam Maths Puzzle Numerical Ability

Is there a quadratic functions with zeros x = 1, x = 2, and x = 3?

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exam Other Question

An airplane flew for 4 hours with a 20-km/h tail wind. The return flight against the same wind took 5 hours. Find the speed of the plane in still air.
THANK YOU!!! What is the reciprocal of (-1/2)(8/4)(12)