Heyy free 40 points I would give more but i have done 100 ,60 ,and 40

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

Which of the following is the result of expanding the series

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]