document.write( "Question 1108467: What is the maximum or minimum value of f(x)=2x^2-8x-3 and how do you find it? \n" ); document.write( "
Algebra.Com's Answer #723517 by ikleyn(52781)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( " \r\n" ); document.write( "Use the \"completing the square method:\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( " 2x^2 - 8x - 3 = \r\n" ); document.write( "\r\n" ); document.write( "= (2x^2 - 8x + 8) - 8 - 3 =\r\n" ); document.write( "\r\n" ); document.write( "= 2*(x - 4x + 4) - 11 =\r\n" ); document.write( "\r\n" ); document.write( "= 2*(x-2)^2 - 11.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "The minimum is achieved at x= 2. The value of the minimum is -11.\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( "See the lessons\r \n" ); document.write( "\n" ); document.write( " - HOW TO complete the square - Learning by examples \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " - HOW TO complete the square to find the minimum/maximum of a quadratic function\r \n" ); document.write( "\n" ); document.write( " - Briefly on finding the minimum/maximum of a quadratic function\r \n" ); document.write( "\n" ); document.write( " - HOW TO complete the square to find the vertex of a parabola\r \n" ); document.write( "\n" ); document.write( " - Briefly on finding the vertex of a parabola\r \n" ); document.write( "\n" ); document.write( "in this site.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r \n" ); document.write( "\n" ); document.write( " - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the topic \"Finding minimum/maximum of quadratic functions\". \r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I \n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |