x squared minus four thirds x plus four over nine

Answer 1

x^2 - (4/3)x + 4/9. (4/3)x = 4x/3,
x^2 -4x/3 + 4/9
Common denominator = 9:
(9x^2 - 12x + 4) / 9,
Factor trinominal:
(3x - 2)^2 / 9 = (3x - 2) (3x - 2) / 9