exam Maths Puzzle Numerical Ability

Please help me answer this question. If 4-i is a solution of a quadratic equation with a real coefficiant. What is the other solution and why?

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exam Other Question

__6__ ___4____
(2x-3)= (9x-5)
The problem : y=2x+3; domain: -4 equal to or less than x less than or equal to 0 graph the function with the given domain and identify the range of the function HELP !! thank you