Add the fractions and simplify the answer 1/2+2/3

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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