document.write( "Question 1149468: Which expression is prime?
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document.write( "A
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document.write( "x2 - 14x + 49\r
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document.write( "B
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document.write( "x2 + 14x + 49\r
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document.write( "C
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document.write( "x2 - 2x + 49\r
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document.write( "D
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document.write( "x2 + 2x + 1\r
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document.write( "and how \n" );
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Algebra.Com's Answer #770785 by Boreal(15235) 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. \n" ); document.write( " |