Question 1126027
{{{ L = W + 4 }}}
{{{ A = 27 }}}
{{{ A = L*W }}}
{{{ 27 = ( W+4 )*W }}}
{{{ 27 = W^2 + 4W }}}
{{{ W^2 + 4W - 27 = 0 }}}
{{{ W = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{ a = 1 }}}
{{{ b = 4 }}}
{{{ c = -27 }}}
{{{ W = ( -4 +-sqrt( 4^2 - 4*1*(-27)))/( 2*1 ) }}}
{{{ W = ( -4 +-sqrt( 16 + 108 ))/2 }}}
{{{ W = ( -4 +-sqrt( 124 ))/2 }}}
{{{ W = -2 + 11.136/2 }}}
{{{ W = -2 + 5.568 }}}
{{{ W = 3.568 }}}
and
{{{ W = -2 - 5.568 }}}
{{{ W = -7.568 }}}
and
{{{ L = 3.568 + 4 }}}
{{{ L = 7.568 }}}
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check answers:
{{{ A = 3.568*7.568 }}}
{{{ A = 27.003 }}}
error due to rounding off