Select the approximate values of x that are solutions to f(x) = 0, where

f(x) = -8x2 + 7x + 6.

8 x^2 - 7 x - 6 = 0

x = [ 7 +/- sqrt (49+192)] /16

x = [ 7 +/- 15.5 ] / 16

x = 1.406 or -.531