solve this using quadratic formula?

4x^2 - 13x + 3 = 0
x = [-b ±√(b^2 - 4ac)]/2a

a = 4
b = -13
c = 3

x = [13 ±√(169 - 48)]/8
x = [13 ±√121]/8
x = [13 ±11]/8

x = [13 + 11]/8
x = 24/8
x = 3

x = [13 - 11]/8
x = 2/8
x = 1/4 (0.25)

∴ x = 1/4 (0.25) , 3

x = [ 13 ± √ (169 - 48 ) ] / 8
x = [ 13 ± √ (121) ] / 8
x = [ 13 ± 11 ] / 8
x = 24 / 8 , x = 2 / 8
x = 3 , x = 1/4