Find the area of a triangle with legs that are: 9 mm, 6 mm, and 12 mm. A. 26.1 mm
B. 12.3 mm
C. 11.6 mm
D. 37 mm?

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