Solve this equation 6n^2+7n-20=0

Question

Solve the equation 6n^2+7n-20=0

Answer 1

6n^2+7n-20=0

a=6, b = 7, c = - 20

          -b+/- sqrt(b^2 - 4ac)         - 7 +/- sqrt( 7^2 -4*6(- 20))

x = ----------------------------- = ---------------------------------------

                     2a                                    2*6

       - 7 +/- sqrt 529                  - 7 +/- 23

x = ----------------------------- = ------------------

              12                               12

 x = ( -7 - 23)/12 = - 30/12 = - 5/2 and

x = ( - 7 + 23)/12 = 16/12 = 4/3