document.write( "Question 135546: The diagonal of a rectangle is 25 inches more than its width. The length of the rectangle is 23 inches more than its width. What is the width of the rectangle? \n" ); document.write( "
Algebra.Com's Answer #99440 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! The diagonal of a rectangle is 25 inches more than its width. The length of the rectangle is 23 inches more than its width. What is the width of the rectangle? \n" ); document.write( ": \n" ); document.write( "Use pythag: a^2 + b^2 = c^2 \n" ); document.write( ": \n" ); document.write( "Let b = width \n" ); document.write( "then \n" ); document.write( "a = (b+23) \n" ); document.write( "and \n" ); document.write( "c = (b+25) \n" ); document.write( ": \n" ); document.write( "(b+23)^2 + b^2 = (b+25)^2 \n" ); document.write( "FOIL \n" ); document.write( "b^2 + 46b + 529 + b^2 = b^2 + 50b + 625 \n" ); document.write( "Combine like terms on the left \n" ); document.write( "b^2 + b^2 - b^2 + 46b - 50b + 529 - 625 = 0 \n" ); document.write( ": \n" ); document.write( "b^2 - 4b - 96 = 0 \n" ); document.write( "Factor \n" ); document.write( "(b-12)(b+8) = 0 \n" ); document.write( ": \n" ); document.write( "b = +12 inches is the width \n" ); document.write( "then \n" ); document.write( "12 + 23 = 35 inches is the length \n" ); document.write( "and \n" ); document.write( "12 + 25 = 37 inches is the diagonal: \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check solution: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |