Determine which elementary row operation was oerformed, zoom in to see, first question

Is every rectangle is a parallelogram? true false

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat