Please help me! The image attached is the question

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

How do i put 3(x+7) in distributive property

Which term below correctly completes the following sentence? if a function has a vertical asymptote at a certain x value, then the function is what at that value