Take (1/2) of the coefficient on "x," i.e., (-8/3)....so ....(1/2)(-8/3) = -8/6
To find "c," square this = (64/36) = (16/9) = c
So, the polynomial is x2 - (8/3)x + 16/9
And to factor this, we have
[x - 4/3 ] 2
The correct answer is "c"