When the product of 6 and the square of a number is increased by 5 times the number, the result is 4. select all the values that the number could be

Hello : let : x this number 
6x²-5x =4
6x² -5x -4 = 0 
the discriminant : Δ = b²-4ac       a = 6    b= -5    c = -4
Δ = (-5)²-4(6)(-4) =25 +96 = 121 = 11²
x1 = (5-11) /12 = -1/2
x2 = (5+11)/12 =16/12=4/3

Check the internet ok that will