document.write( "Question 735737: How do find the factor of x^2-x-20? \n" ); document.write( "
Algebra.Com's Answer #449532 by blwinbbbles(106)![]() ![]() You can put this solution on YOUR website! you find the factor by starting with factors of 20..\r \n" ); document.write( "\n" ); document.write( "so you can have 1x20, 2x10, 4x5, of these pairs would be most likely to produce a -x...my guess would be 4 and 5...since it is a -20 in the equation then there need to be one neg number and one positive number.\r \n" ); document.write( "\n" ); document.write( "so I would start with:\r \n" ); document.write( "\n" ); document.write( "(x-5)(x+4) this will equal\r \n" ); document.write( "\n" ); document.write( "x^2 + 4x - 5x - 20 combine like terms\r \n" ); document.write( "\n" ); document.write( "x^2 - x - 20\r \n" ); document.write( "\n" ); document.write( "so the factors are:\r \n" ); document.write( "\n" ); document.write( "(x-5) and (x + 4) \n" ); document.write( " \n" ); document.write( " |