document.write( "Question 1090501: hi can somebody please help me with this question?
\n" ); document.write( "for what value(s) of k will the function g(x)=x^2+kx+1 have only one zero
\n" ); document.write( "A.0
\n" ); document.write( "B.2
\n" ); document.write( "C.-2,2
\n" ); document.write( "D. no values will work.
\n" ); document.write( "Thank you so much.
\n" ); document.write( "

Algebra.Com's Answer #704942 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
The quadratic needs to be a perfect square.
\n" ); document.write( "\"%28x%2Ba%29%5E2=x%5E2%2B2a%2Ba%5E2\"
\n" ); document.write( "So \"a%5E2=1\"
\n" ); document.write( "\"a%5E2-1=0\"
\n" ); document.write( "\"%28a%2B1%29%28a-1%29=0\"
\n" ); document.write( "\"a=-1\"
\n" ); document.write( "\"a=1\"
\n" ); document.write( "So then,
\n" ); document.write( "\"k=2a\"
\n" ); document.write( "\"k=-2\" and \"k=2\"
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