document.write( "Question 15661: The length of a rectangle is three inches more than the width. The area of the rectangle is 270 inches. Find the width of the rectangle. \n" ); document.write( "

Algebra.Com's Answer #7754 by pwac(253) $\"\"$ $\"About$

You can put this solution on YOUR website!
Width=x
\n" ); document.write( "Length=x+3
\n" ); document.write( "x(x+3)=270 Multiply bracket and rearrange gives:
\n" ); document.write( " $\"x%5E2%2B3x-270\"$ a quadratic that can be solved using quadratic formula:
\n" ); document.write( " $\"x=%28-b%2B-sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F2%2Aa%29\"$ hope you are familiar with this, looks daunting but easy to use.Plug in your values:a=1,b=3 and c=-270.
\n" ); document.write( "Gives two values for x
\n" ); document.write( "x=15 and x=-18
\n" ); document.write( "Obviously your answer is x=15inches(width)\r
\n" ); document.write( "\n" ); document.write( "Pete \n" ); document.write( "

\n" );