document.write( "Question 48002:  solve the equation \r
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document.write( "(4x+3.2)(9x-24.3)=0 \n" );
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| Algebra.Com's Answer #31769 by longjonsilver(2297)     You can put this solution on YOUR website! you have (4x+3.2)(9x-24.3)=0 which is 2 things multiplied together equalling zero. So \"two numbers multiply to give zero\". What we INSTANTLY know in this situation is that one of the 2 numbers must be zero, since:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "2x3 is 6, not zero \n" ); document.write( "30x4 is 120, not zero \n" ); document.write( "but \n" ); document.write( "0x35 is zero \n" ); document.write( "28.1112x0 is zero \n" ); document.write( "etc\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So, either (4x+3.2)=0 or (9x-24.3)=0 \n" ); document.write( "so, 4x = -3.2 or 9x = 24.3 \n" ); document.write( "so x = (-3.2)/4 or x = (24.3)/9 \n" ); document.write( "x = -0.8 or x = 2.7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "jon \n" ); document.write( " \n" ); document.write( " |