document.write( "Question 293261: a rectangle is 4 inches wide by 7 inches long. when the length and width are increased by the same amount, the area is increased by 26 square inches. what are the dimensions of the new rectangle \n" ); document.write( "
Algebra.Com's Answer #211711 by checkley77(12844)\"\" \"About 
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(4+x)(7+x)=4*7+26
\n" ); document.write( "28+11x+x^2=28+26
\n" ); document.write( "x^2+11x+28-28-26=0
\n" ); document.write( "x^2+11x-26=0
\n" ); document.write( "(x+13)(x-2)=0
\n" ); document.write( "x-2=0
\n" ); document.write( "x=2 ans. for the increase.
\n" ); document.write( "Proof:
\n" ); document.write( "(4+2)(7+2)=4*7+26
\n" ); document.write( "6*9=54
\n" ); document.write( "54=54
\n" ); document.write( "
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