document.write( "Question 30341: Which of the following is a factor of the polynomial x^2 - x - 20?\r
\n" ); document.write( "\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
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Algebra.Com's Answer #17009 by venugopalramana(3286)\"\" \"About 
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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( "
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