document.write( "Question 228369: (5x-1)(3x+7) \n" ); document.write( "
Algebra.Com's Answer #169538 by rapaljer(4671)![]() ![]() You can put this solution on YOUR website! There are a couple of ways to multiply the product of two binomials like this. I recommend something called F O I L. \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(5x-1)(3x+7)\r \n" ); document.write( "\n" ); document.write( "F=5x*3x= 15x^2 \n" ); document.write( "O=5x*7=35x \n" ); document.write( "I=-1*3x=-3x \n" ); document.write( "L=-1*7=-7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Add together: \n" ); document.write( "15x^2 + 35x - 3x - 7 \n" ); document.write( "15x^2 + 32x - 7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Dr. Robert J. Rapalje, Retired \n" ); document.write( "Seminole State College \n" ); document.write( " |