document.write( "Question 1132482: Find the quadratic equation whose root are -1/4 and 3.\r
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Algebra.Com's Answer #749530 by Theo(13342)![]() ![]() You can put this solution on YOUR website! the roots are at x = -1/4 and x = 3. \n" ); document.write( "set these equations to 0 by doing the following. \n" ); document.write( "add 1/4 to both sides of x = -1/4 to get x + 1/4 = 0 \n" ); document.write( "subtract 3 from both sides of x = 3 to get x - 3 = 0 \n" ); document.write( "the factors of the quadratic equation are (x + 1/4) * (x - 3) = 0 \n" ); document.write( "set the equation equal to y and simplify to get: \n" ); document.write( "y = x^2 - 3x + 1/4 * x - 3/4 \n" ); document.write( "combine like terms to get y = x^2 - 2.75x - 3/4 \n" ); document.write( "in fact, the quadratic equation can be a * (x^2 - 2.75x - 3/4) \n" ); document.write( "if a = 1, you get x^2 - 2.75x - 3/4. \n" ); document.write( "if a = 4, you get 4x^2 - 11x - 3. \n" ); document.write( "a can be any value and the roots of the equation will be the same. \n" ); document.write( "the graph above shows the basic equation of x^2 - 2.75x - 3/4 with various values of a to show that the roots remain the same even though the quadratic equation itself is different after being gernerated by the diffedrent values of a. \n" ); document.write( "the two versions of the red equation show you that they are, in fact, the same equivalent equations that generate the same red graph. \n" ); document.write( "here's the graph. \n" ); document.write( " ![]() \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "here's some references.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "https://mathbitsnotebook.com/Algebra1/Quadratics/QDGetEquation.html\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "https://www.purplemath.com/modules/fromzero.htm\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |