document.write( "Question 149411: Create a real-life situation that fits into the equation (x+4)(x-7) = 0 and express the situation as the same equation. \n" ); document.write( "
Algebra.Com's Answer #109627 by ankor@dixie-net.com(22740) You can put this solution on YOUR website! Create a real-life situation that fits into the equation (x+4)(x-7) = 0 and express the situation as the same equation. \n" ); document.write( ": \n" ); document.write( "A simple problems would be. You want a rectangular area of 28 sq/ft \n" ); document.write( "You want the length to be 3 ft longer than the width, Find the dimensions: \n" ); document.write( "; \n" ); document.write( "Let x = length \n" ); document.write( "then \n" ); document.write( "(x-3) = width \n" ); document.write( "and \n" ); document.write( "Area = x(x-3) = x^2 - 3x \n" ); document.write( ": \n" ); document.write( "Area equation: \n" ); document.write( "x^2 - 3x = 28 \n" ); document.write( ": \n" ); document.write( "A quadratic equation \n" ); document.write( "x^2 -3x - 28 = 0 \n" ); document.write( ": \n" ); document.write( "factor this to: \n" ); document.write( "(x-7)(x+4) = 0 \n" ); document.write( ": \n" ); document.write( "Positive solution: \n" ); document.write( "x = +7 is the length \n" ); document.write( " |