document.write( "Question 806049: Please help me solve this problem:\r
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document.write( "DIVIDE x^3-6 by x-2\r
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document.write( "Thank you! \n" );
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Algebra.Com's Answer #839086 by ikleyn(52814)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "Please help me solve this problem: \n" ); document.write( "DIVIDE x^3-6 by x-2 \n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " I will show you another, nontraditional way to solve the problem, \r \n" ); document.write( "\n" ); document.write( " which is (I am 100% sure) absolutely unexpected to you (and to many others).\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \r\n" ); document.write( "Start from this innocent transformation\r\n" ); document.write( "\r\n" ); document.write( " x^3 - 6 = (x^3 - 8) + 2.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "For the parentheses in the right side, use well known decomposition\r\n" ); document.write( "\r\n" ); document.write( " a^3 - b^3 = (a-b)*(a^2 + ab + b^2).\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "Take here a= x, b= 2. You will get then\r\n" ); document.write( "\r\n" ); document.write( " x^3 - 8 = (x-2)*(x^2 + 2x + 4).\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "Therefore,\r\n" ); document.write( "\r\n" ); document.write( " x^3 - 6 = (x^3 - 8) + 2 = (x-2)*(x^2 + 2x + 4) + 2.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "It means that \r\n" ); document.write( "\r\n" ); document.write( "\r \n" ); document.write( "\n" ); document.write( "Solved.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "It is good solution to show it at the local school Math circle.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The students will be positively shocked (= overwhelmed; = stunned) : a deafening effect is guaranteed.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Notice that I did not make any division for it - neither polynomial nor synthetic.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I extracted the solution from the air, using the method called \" focus-pocus \".\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "After such an \" exercise \", the students will know and understand Math \" in two times better \" than before it.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "And they will have a stimulus to learn it better.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |