Yes or no?

Yes

Step-by-step explanation:

If a triangle follows the Pythagorean theorem, then it is right. The Pythagorean theorem states the following,

Where (a) and (b) are the legs or sides adjacent to the right angle of the right triangle, and (c) is the hypotenuse, side opposite the right angle, the longest side.

Substitute in the given values and solve,

The given side lengths form a right triangle.

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

you didn't give an question you just gave us a statement