Question 1072715
Complete the square,
{{{y=x^2-4x+13}}}
{{{x^2-4x+13=0}}}
{{{(x^2-4x+4)+13=4}}}
{{{(x-2)^2=-9}}}
{{{x-2=0 +- 3i}}}
{{{x=2 +- 3i}}}