exam Maths Puzzle Numerical Ability

May I have some help with this expression?

Find all solutions of the equation and express them in the form a + bi.

x^2 + 12x + 37 = 0

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exam Other Question

multiply n^2-n-20/2n^2 multiplied by n^2+5n/n^2-25

My answer is n-4/2n Am I right? Please help, Thanks A rope was cut into two pieces so that one piece was 18 m longer than the other. That piece was also three times as long as the other. How long was each piece and how long was th