Question 1121801
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Let w be the page width, in inches.


Then its length is (w+3) inches.


The printed area has dimensions in 2 = 1 + 1 inches less. Therefore, the equation for the printed area is


(w-2)*(w+1) = 80.


w^2 -w - 82 = 0.


Solve it using the quadratic formula.


{{{w[1,2]}}} = {{{(1 +- sqrt(1^2 +4*82))/2}}} = {{{(1 +- sqrt(329))/2}}} = {{{(1 +- 18.14)/2}}}.


Only positive value of w makes sense, which is  w = {{{(1 + 18.14)/2}}} = 9.57 inches.


<U>Answer</U>.  The dimensions of the page are  9.57 and 12.57 inches.


<U>Check</U>.   (9.57-2)*(12.57-2) = 80.0 square inches.  The solution is correct.
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