In order to factor , first we need to ask ourselves: What two numbers multiply to 5 and add to -9? Lets find out by listing all of the possible factors of 5 \n" );
document.write( " \n" );
document.write( " \n" );
document.write( " Factors: \n" );
document.write( " \n" );
document.write( " 1,5, \n" );
document.write( " \n" );
document.write( " -1,-5,List the negative factors as well. This will allow us to find all possible combinations \n" );
document.write( " \n" );
document.write( " These factors pair up to multiply to 5. \n" );
document.write( " \n" );
document.write( " 1*5=5 \n" );
document.write( " \n" );
document.write( " (-1)*(-5)=5 \n" );
document.write( " \n" );
document.write( " note: remember two negative numbers multiplied together make a positive number \n" );
document.write( " \n" );
document.write( " Now which of these pairs add to -9? Lets make a table of all of the pairs of factors we multiplied and see which two numbers add to -9 \n" );
document.write( " \n" );
document.write( " First Number | | | Second Number | | | Sum | 1 | | | 5 | || | 1+5=6 | -1 | | | -5 | || | -1+(-5)=-6 | \r\n" );
document.write( " \r\n" );
document.write( " None of these factors add to -9. So this quadratic cannot be factored. In order to solve for x, we need to use the quadratic formula.\n" );
document.write( " \n" );
document.write( " \n" );
document.write( "\n" );
document.write( "as you can see, cannot be factored; so, your solution is:\r \n" );
document.write( "\n" );
document.write( " \n" );
document.write( " \n" );
|