document.write( "Question 725215: Hello,
\n" );
document.write( "May I ask for help with the following questions?\r
\n" );
document.write( "\n" );
document.write( "Factor the trinomials-
\n" );
document.write( "6x^2+31x+5
\n" );
document.write( "I think that this cannot be factored. \r
\n" );
document.write( "\n" );
document.write( "Also,
\n" );
document.write( "X^2-8xy+12y^2\r
\n" );
document.write( "\n" );
document.write( "I can't seem to move on from these two questions. Thank you for your help. \n" );
document.write( "
Algebra.Com's Answer #444024 by solver91311(24713)![]() ![]() You can put this solution on YOUR website! \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Of course it can be factored. Here is how to tell quickly. Square the coefficient on the first degree term: 31 times 31 is 961. Multiply 4 times the lead coefficient times the constant term. 4 times 6 times 5 is 120. Subtract the second result from the first: 961 minus 120 is 841. Then take the square root of that result. If it is a perfect square, and in this case square root of 841 is exactly 29, then the quadratic trinomial is factorable over the rational numbers.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Here is a process that you might try. Multiply the lead coefficient times the constant term. List the two number factorizations of this product. Find a pair of factors that when summed equal the first degree term coefficient. 6 times 5 is 30. 30 times 1 is 30, and 30 plus 1 is 31 which is your middle term coefficient. Re-write your trinomial into a four term polynomial splitting the middle term as suggested by the above factorization:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Then group the two pairs of factors:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Factor the GCF out of each group:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Properly performed, the two binomial factors should be identical for a factorable quadratic, so factor out the binomials:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "John \n" ); document.write( " \n" ); document.write( "Egw to Beta kai to Sigma \n" ); document.write( "My calculator said it, I believe it, that settles it \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |