If x = 0 and y< 0 where is the point (x, y) located with

Which elements in the set below are integers? 12, –3⁄4,√ 25 , –7, √ 5 , 14⁄7, 9 a. 12, √ 25 , –7, 9 b. 12, √ 25 , –7, 14⁄7, 9 c. –3⁄4, 25 , √ 5 ,14⁄7 d. 12, –7, 9

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Could somebody me with this radical simplification?