exam Maths Puzzle Numerical Ability

Factor the polynomial. a^2-2a-35

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exam Other Question

Science and medicine.
A plane flies 720 mi against a steady 30-mi/h headwind
and then returns to the same point with the wind. If the entire trip takes 10 hours, what is the plan Solve 2(x-1)^2 = -16 over the set of complex numbers.