document.write( "Question 1019082: Find the discriminant. -4n^2+9n-13=-7 \n" ); document.write( "
Algebra.Com's Answer #635079 by fractalier(6550)\"\" \"About 
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Rewriting
\n" ); document.write( "-4n^2 + 9n - 13 = -7
\n" ); document.write( "we get
\n" ); document.write( "-4n^2 + 9n - 6 = 0
\n" ); document.write( "The discriminant is b^2 - 4ac. Here that is
\n" ); document.write( "9^2 - 4(-4)(-6) = 81 - 96 =
\n" ); document.write( "-15
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