Plz help me I need it done

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

What is the greater volume 72 quarts or 23 gallons

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