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As shown in the figure, the photo frame measures 10 cm in length and 6 cm in width, with a uniform width wooden edge. The area inside for holding the photo is 32 cm². What is the width of the  frame edge in centimeters? We can solve it in this way:
(1) Let the width of the frame edge be x cm, then the equation can be written as ____(general form);
(2) Analyze and determine the range of x;
(3) Complete the table:
\frac{   }(4) Based on the table above, determine the width of the frame edge in centimeters.