Question 804696
you need to turn the equation into vertex form by completing the square.
{{{k^2+4k+3}}}
{{{k^2+4k+4-4+3}}}
{{{(k+2)^2-1}}}
now looking at this you can tell that the vertex is (-2,-1).
{{{graph( 400, 400, -10, 10, -10, 10, x^2+4x+3)}}}