HELP QUIXK Which side lengths form a right triangle?

Which of the binomials below is a factor of this trinominal? x^2-13+30

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.