document.write( "Question 1081547: (a) A rectangular plot is to be enclosed by fencing wire. Assume that 56 𝑚 of fencing
\n" ); document.write( "wire are available.
\n" ); document.write( "(i) Show that the area of the plot, in 𝑚^2
\n" ); document.write( ", is given by the expression
\n" ); document.write( "𝐴 = −𝑥^2 + 28𝑥,
\n" ); document.write( "where 𝑥 is the length of the plot.\r
\n" ); document.write( "\n" ); document.write( "If someone could explain how I am to work these out that would be great i've been stuck on this for hours and can't find anything \n" ); document.write( "
Algebra.Com's Answer #695618 by Alan3354(69443)\"\" \"About 
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(a) A rectangular plot is to be enclosed by fencing wire. Assume that 56 meters of fencing wire are available.
\n" ); document.write( "(i) Show that the area of the plot, in m^2
\n" ); document.write( " is given by the expression
\n" ); document.write( "Area = -x^2 + 28x,
\n" ); document.write( "where is the length of the plot.
\n" ); document.write( "-----
\n" ); document.write( "If the 56 meters is to be 4 sides or a rectangle:
\n" ); document.write( "56 = perimeter = 2W + 2L
\n" ); document.write( "---
\n" ); document.write( "x = width
\n" ); document.write( "28 - x = length
\n" ); document.write( "------------
\n" ); document.write( "Area = W*L = x*(28-x)
\n" ); document.write( "= -x^2 + 28x \n" ); document.write( "
\n" );