document.write( "Question 30341: Which of the following is a factor of the polynomial x^2 - x - 20?\r
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document.write( "A) x-5
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document.write( "B) x-4
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document.write( "C) x+2
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document.write( "D) x+5
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document.write( "E) x+10 \n" );
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Algebra.Com's Answer #17009 by venugopalramana(3286)![]() ![]() You can put this solution on YOUR website! Which of the following is a factor of the polynomial x^2 - x - 20? \n" ); document.write( "THERE ARE 2 METHODS \n" ); document.write( "1 FACTORISE AND CHECK..F(X)=X^2-X-20=X^2-5X+4X-20=X(X-5)+4(X-5)=(X-5)(X+4) \n" ); document.write( "SO...A...X-5 IS THE ANSWER. \n" ); document.write( "2...PUT X=5,4,-2..ETC..AS PER THE ANSWERS AND CHECK WHEN FUNCTION F(X) BECOMES ZERO..WE SEE THAT F(5)=0..SO X-5 IS A FACTOR. \n" ); document.write( "A) x-5 \n" ); document.write( "B) x-4 \n" ); document.write( "C) x+2 \n" ); document.write( "D) x+5 \n" ); document.write( "E) x+10 \n" ); document.write( " \n" ); document.write( " |