The answers are x = 2.33 and x=1
3x^2 - 10x + 7 = 0
x3
x^2 - 10x + 21 = 0
After you find the factors, you divide them by 3, since you multiplied by 3 before.
(x - 7/3) (x - 3/3)
Simplify.
(x - 2.33) (x - 1)
Equal both to zero and solve.
(x - 2.33) = 0
(x - 1) = 0
x = 2.33
x = 1