Question 407263
simply factor:
81y^2-16z^2 
rewrite as:
(9y)^2 - (4z)^2
the above is a "difference of squares" whic factors to:
(9y-4z)(9y+4z)
.
since area is width*length
one possible set of dimension is:
width is 9y-4z meters
length is 9y+4z meters