document.write( "Question 188517: (5x+4)^2=100 \n" ); document.write( "
Algebra.Com's Answer #141353 by feliz1965(151)![]() ![]() ![]() You can put this solution on YOUR website! I will set it up and you can take it from there.\r \n" ); document.write( "\n" ); document.write( "(5x + 4)^2 = (5x + 4)(5x + 4) \r \n" ); document.write( "\n" ); document.write( "(5x + 4)(5x + 4) becomes 25x^2 + 40x + 16 using FOIL. \r \n" ); document.write( "\n" ); document.write( "We now equate to 100.\r \n" ); document.write( "\n" ); document.write( "25x^2 + 40x + 16 = 100\r \n" ); document.write( "\n" ); document.write( "Subtract 100 from both sides of the equation to make a quadratic equation.\r \n" ); document.write( "\n" ); document.write( "25x^2 + 40x + 16 - 100 = 0\r \n" ); document.write( "\n" ); document.write( "25x^2 + 40x + 84 = 0\r \n" ); document.write( "\n" ); document.write( "Can you take it from there?\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |