. Reason Let D = {-2, -1, 0, 1, 2}. Is D a subset of
itself? Explain.

HELP ASAP

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

10 points? me . its important ‼️‼️