document.write( "Question 278733: This question deals with solving the quadratic equation by using the quadratic formula. The question is x^2=18-7X. I know the formula is ax^2+bx+c=0, A does not equal 0. I've looked at the formula, but have no idea how exactly to use it. ANy help would be much appreciated. Thanks. \n" ); document.write( "
Algebra.Com's Answer #202838 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! ax^2+bx+c=0 is the general form of a quadratic equation\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the quadratic \"formula\" is derived by using the \"completing the square\" technique on the general equation\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = [-b ± sqrt(b^2 - 4ac)] / (2a)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "put the equation in general form (equal to zero) and then plug the resulting values for a, b, and c into the formula \n" ); document.write( " |