document.write( "Question 135244: Given the function f(x) = 3x2-2x-1, graph f(x) labeling the x and y intercept(s), vertex, and axis of symmetry. \n" ); document.write( "
Algebra.Com's Answer #99264 by smarty1994(10)![]() ![]() ![]() You can put this solution on YOUR website! Okay, so you'd label the coefficients a, b, and c. (I find it less confusing that way.) \r \n" ); document.write( "\n" ); document.write( "Then plug it into the quadratic formula.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You get x=1.7 & x=-1\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Plug each back into the original equation. You get (1.7,4.3) & (-1,4).\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "To find the vertex, plug the correct numbers into the formula, x=-b/2a. \n" ); document.write( "Plug that answer (.3) into the original equation to find y.\r \n" ); document.write( "\n" ); document.write( "The vertex is (.3,-1.3).\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The axis of symmetry is y=-1.3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "**I did this using the Quadratic Solver, but found it very confusing. \n" ); document.write( " |