Question

If f(x) is a polynomial with real coefficients such that f(7+5i) = 39 + 13i, then f(7−5i) = a + bi. What is the value of a+b?

Answer 1

i would just give you the hint....f(x)=x^2-14x+113.......now put the value x=7-5i.....you would get yourself...