Question

resolva, em C, a equação x² -4x+13=0

Answer 1

$x^2-4x+13=0\\\Delta=(-4)^2-4.1.13\\\Delta=16-52\\\Delta=-36$

$x= \frac{4\pm \sqrt{-36} }{2}$

$x= \frac{4\pm6i}{2} \\ \\x=2\pm3i\\ \\\boxed{x'=2-3i}$

$\boxed{x''=2+3i}$