document.write( "Question 935684: If the diagonal of a rectangle has a length 7 feet and the rectangles area is 16 square feet find the number of feet in the rectangles perimeter \n" ); document.write( "
Algebra.Com's Answer #568972 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
The diagonal of the rectangle is a hypotenuse for each of the two triangles that it forms. \r
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\n" ); document.write( "\n" ); document.write( "x and y, length and \"width\",
\n" ); document.write( "\"system%28x%5E2%2By%5E2=7%5E2%2Cxy=16%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=16%2Fx\", substitute this.
\n" ); document.write( "\"x%5E2%2B%2816%2Fx%29%5E2=49\"
\n" ); document.write( "\"x%5E4%2B16=49x%5E2\"
\n" ); document.write( "\"x%5E4-49x%5E2%2B16=0\", quadratic form.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2=%2849%2Bsqrt%2849%5E2-4%2A16%29%29%2F2\"
\n" ); document.write( "\"x%5E2=%2849%2Bsqrt%282337%29%29%2F2\"\r
\n" ); document.write( "\n" ); document.write( "2337=3*779=3*19*41\r
\n" ); document.write( "\n" ); document.write( "Computing into base-ten values,
\n" ); document.write( "\"highlight%28x=sqrt%28%2849%2Bsqrt%282337%29%29%2F2%29%29\"
\n" ); document.write( "x=0.328736 and y=48.671264
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\n" ); document.write( "Perimeter would be \"highlight%282%280.328736%2B48.671264%29%29\", and you can choose what accuracy you want, or recalculate x and y to greater accuracy and use that if you want.\r
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\n" ); document.write( "\n" ); document.write( "The quadratic form equation found in x would be the same if found in y, so the PLUS_OR_MINUS forms of the general solution method will give separately the x and the y. Both are found and understood as positive values.
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