Please help with the answer to this one!

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Could someone me with this question i’ve been stuck on it for 20 minutes

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.