document.write( "Question 517066: The width of a rectangle is 6 inches less than the length, and the area is 40 square inches. What are the length and width of the rectangle? \n" ); document.write( "

Algebra.Com's Answer #344644 by JBarnum(2146) $\"\"$ $\"About$

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$\"lw=A\"$
\n" ); document.write( " $\"w=l-6\"$
\n" ); document.write( " $\"A=40\"$
\n" ); document.write( "l and w must be positive
\n" ); document.write( "--------------------
\n" ); document.write( " $\"l%28l-6%29=40\"$
\n" ); document.write( " $\"l%5E2-6l=40\"$
\n" ); document.write( " $\"l%5E2-6l-40=0\"$
\n" ); document.write( "find 2 numbers that multiply to get -40 and add to get -6
\n" ); document.write( "-10(4)=-40 , -10+4=6 so -10 and 4
\n" ); document.write( " $\"%28l-10%29%28l%2B4%29\"$
\n" ); document.write( " $\"highlight%28l=10%29\"$ cannot be negative
\n" ); document.write( " $\"w=l-6\"$
\n" ); document.write( " $\"w=%2810%29-6\"$
\n" ); document.write( " $\"highlight%28w=4%29\"$
\n" ); document.write( " \n" ); document.write( "

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