exam Maths Puzzle Numerical Ability

Factor: -4ax^2 + 2x^3 + 2x^4

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exam Other Question

Jeff starts driving at 55 mph from the same point that Lauren starts driving from 70 mph. They drive in opp. Directions and Lauren has a half hour head start. How long will they be able to talk on their cell phone and have a 440 mile range. Solve in terms of cosine:Sin4x