Question 748848
Length = x  Width = x - 6
Area = x(x - 6) = x^2 - 6x
 x^2 - 6x = 112
 x^2 - 6x - 112 = 0
 (x - 14)(x + 8) = 0

 x = 14  (x = -8 no answer)
Therefore Length = 14cm
       and Width =  8 cm
   Area = l x w = 112 cm^2