Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AC = 42 and DC = 11, what is the length of BC in
simplest radical form?
B

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 you solving the solution of each system using elimination?

∆red ≅ ∆ by rule will give brainiest if possible