document.write( "Question 1005918: it is given that the axis of symmetry of the graph of the function y=x^2+kx+5 is x＝-3. Find the value of k. \n" ); document.write( "

Algebra.Com's Answer #622051 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "Complete the square to get to vertex form,
\n" ); document.write( " $\"y=x%5E2%2Bkx%2B%28k%2F2%29%5E2%2B5-%28k%2F2%29%5E2\"$
\n" ); document.write( " $\"y=%28x%2Bk%2F2%29%5E2%2B5-%28k%2F2%29%5E2\"$
\n" ); document.write( "The vertex lies on the axis of symmetry so when $\"x=-3\"$ ,
\n" ); document.write( " $\"-3%2Bk%2F2=0\"$
\n" ); document.write( " $\"k%2F2=3\"$
\n" ); document.write( " $\"k=6\"$
\n" ); document.write( " \n" ); document.write( "

\n" );