I think its D
Explanation:
here is your answer. i think i did it right.
we have

Equate the expression to zero to find the roots

Group terms that contain the same variable, and move the constant to the opposite side of the equation

Factor the leading coefficient

Complete the square. Remember to balance the equation by adding the same constants to each side.


Rewrite as perfect squares


square roots both sides


the roots are


so

therefore
<u>the answer is the option</u>

Answer:
160/3
9-<u>1</u>
<u> </u><u> </u><u> </u><u>3</u>=21-1/3*8=160/3
1/8