document.write( "Question 1139709: Hi there!\r
\n" ); document.write( "\n" ); document.write( "I have a question about complex numbers. We need to find k and the roots if 2x^2+8x+k=0 and the product of the roots is 4. Thank you so much for helping!
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Algebra.Com's Answer #760211 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "The product of the roots of the quadratic equation

\n" ); document.write( "\"ax%5E2%2Bbx%2Bc=0\"

\n" ); document.write( "is \"c%2Fa\".

\n" ); document.write( "So in your equation, the product of the roots is \"k%2F2\".

\n" ); document.write( "Since you are given that the product of the roots is 4, k is 8.

\n" ); document.write( "Then

\n" ); document.write( "\"2x%5E2%2B8x%2B8+=+0\"
\n" ); document.write( "\"x%5E2%2B4x%2B4+=+0\"
\n" ); document.write( "\"%28x%2B2%29%5E2+=+0\"

\n" ); document.write( "The roots are -2 and -2.
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