document.write( "Question 1032429: The perimeter of a square and a rectangle are equal. One side of the rectangle is 11 cm and the area of the square is 4 cm^2 more than the area of the rectangle. Find the side of square \n" ); document.write( "
Algebra.Com's Answer #647113 by jorel555(1290)![]() ![]() ![]() You can put this solution on YOUR website! Let x=one side of the square; y=one side of the rectangle: \n" ); document.write( "The perimeters are equal, so 4x=2y+22, or y=2x-11. The areas are given by x^2, and 11(2x-11). Since the square is 4 cm^2 larger than the rectangle, we get:\r \n" ); document.write( "\n" ); document.write( "x^2-4=11(2x-11) \n" ); document.write( "x^2-4=22x-121 \n" ); document.write( "x^2-22x+117=0 \n" ); document.write( "(x-13)(x-9)=0 \n" ); document.write( "x=13, or 9\r \n" ); document.write( "\n" ); document.write( "Plugging 13 into our original equation, we get a square 13X13 or 169cm^2, and a rectangle (26-11)X 11, or 165cm^2, which satisfies our requirements!!!!!!!\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |