If using the method of completing the square to solve the quadratic equation x2 + 3x -17 = 0, which number would have to be added to "complete the
square"?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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