Can You Solve By Using The Quadratic Formula? Show Complete Solutions (a) 2x2 + 9x - 7 = 0

For an equation of the form ax^2+bx+c =0 , using quaratic formula we know that
x = -b + sqrt (b^2 - 4ac)
          -  
      -------------------------
                  2a

so in our equation 2x2 + 9x - 7 = 0, we have
a = 2, b = 9 and c = -7

applying this in the above formula we get
x = (-9 +/- sqrt(81+56) )/ 4 ; so
x = (-9 + sqrt(137))/4 OR x = (-9-sqrt(137))/4