document.write( "Question 1149468: Which expression is prime?
\n" ); document.write( "A
\n" ); document.write( "x2 - 14x + 49\r
\n" ); document.write( "\n" ); document.write( "B
\n" ); document.write( "x2 + 14x + 49\r
\n" ); document.write( "\n" ); document.write( "C
\n" ); document.write( "x2 - 2x + 49\r
\n" ); document.write( "\n" ); document.write( "D
\n" ); document.write( "x2 + 2x + 1\r
\n" ); document.write( "\n" ); document.write( "and how
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Algebra.Com's Answer #770785 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
first is (x-7)^2
\n" ); document.write( "second is (x+7)^2
\n" ); document.write( "D is (x+1)^2
\n" ); document.write( "it is C
\n" ); document.write( "look at the discriminant, sqrt (b^2-4ac)
\n" ); document.write( "it is prime if that is the sqrt of a negative number
\n" ); document.write( "C has a discriminant of sqrt ((-2)^2-196), which is sqrt (-192), a complex number.
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