Question 385309
width = x
length = 7x-2
..
L*W= Area
...
x(7x-2)=57
7x^2-2x=57
7x^2-2x-57=0
7x^2-21x+19x-57=0
7x(x-3)+19(x-3)=0
(x-3)(7x+19)=0
x= 3 which is positive
Width = 3 in
length = 7x-2 = 21-2=19 in.
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