6 x^2 - 5x = 4
6x^2 - 5x - 4 = 0 subtract 4 from both sides
use the quadratic formula
a = 6 , b = -5 , c = -4
y = [-b + or - sqrt( b^2 -4ac)]/2a
y = [5 + or - sqrt(25 - 4* 6 * (-4))]/ 2 * 6
y = [5 + or - sqrt(25 - 96)]/12
y = [5+or - sqrt(-71)]/12
there is no real solution because of the sqrt of a negative number