document.write( "Question 1011028: A side of a square is 2 cm greater than one of the sides of a rectangle and 5 cm smaller than the other side of the rectangle. Find the area of the square, if it is known, that it is 50 cm2 smaller that the area of the rectangle. \n" ); document.write( "
Algebra.Com's Answer #626562 by ankor@dixie-net.com(22740)\"\" \"About 
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A side of a square is 2 cm greater than one of the sides of a rectangle and 5 cm smaller than the other side of the rectangle.
\n" ); document.write( " Find the area of the square, if it is known, that it is 50 cm2 smaller that the area of the rectangle.
\n" ); document.write( ":
\n" ); document.write( "Let L = length of the rectangle
\n" ); document.write( "Let W = the width
\n" ); document.write( ":
\n" ); document.write( "\"A side of a square is 2 cm greater than one of the sides of a rectangle and 5 cm smaller than the other side of the rectangle.\"
\n" ); document.write( "All side of the square is equal, therefore
\n" ); document.write( "L - 5 = W + 2
\n" ); document.write( "L = W + 7
\n" ); document.write( "\"The square is 50 cm2 smaller that the area of the rectangle.\"
\n" ); document.write( "L*W - (W+2)^2 = 50
\n" ); document.write( "Replace L with (w+7); FOIL (W+2)(W+2)
\n" ); document.write( "W(W+7) - (W^2 + 4W + 4) = 50
\n" ); document.write( "W^2 + 7W - W^2 - 4W - 4 = 50
\n" ); document.write( "Combine like terms
\n" ); document.write( "3W = 50 + 4
\n" ); document.write( "3W = 54
\n" ); document.write( "W = 54/3
\n" ); document.write( "W = 18 is the width of the rectangle
\n" ); document.write( "Then
\n" ); document.write( "18+2 = 20 cm is the side of the square
\n" ); document.write( "and
\n" ); document.write( "20^2 = 400 sq/cm is the area of the square
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