exam Maths Puzzle Numerical Ability

Find all the zeros of P(x)=2x^3-7x^2+22x+13 given that 2+3i is a zero

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3 consecutive odd integers whose sum is one hundred eighty three Tow cars leave town at the same time going in the same direction. One travels 55 mpb and the other travels 48mph. In how many hours will they be 49 miles apart?