Question

if x=2+√-3 then find the value of 4x^2+8x+35

please answer this question ​

Answer 1

x = 2+√-3

substituting x into the equation

4(2+√-3)²+8(2+√-3)+ 35

4(4-3+4√-3) + 16 + 8√-3 + 35

4 + 16√-3 + 16 + 8√-3 + 35

55 + 24√-3

     or

55 + 24√3i ( as √-3 is a complex number)