exam Maths Puzzle Numerical Ability

I am lost on this one????????


Find a polynomial of degree 12 with zeroes and 5,-3/8 and 4+5i


thanks

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exam Other Question
#5.The sum of three numbers is 62. The second number is equal to the
first number diminished by 4. The third number is four times the first.
What are the numbers? find the inverse of the following function; f(x)= 10^(x-3)+4





determine the value of log with a base of n times ab squared so like lognab squared, with the n as a base of log; if log base na (logna)=5 and lognb=3