I need help please help ASAP

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

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Which expression is rational? 6. , square root two, square root 14, square root 49