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The roots are -3+√6 and -3-√6

Explanation:
First, we would need to put the equation in standard form which is as follows:
ax² + bx + c = 0
This can be done as follows:
x² + 6x + 9 - 6 = 0
x² + 6x + 3 = 0

By comparison:
a = 1
b = 6
c = 3

Now, to get the roots, we will need to used the quadratic formula shown in the attached image.

By substitution, we would find that:
either x = -3 + √6
or x = -3 - √6

Hope this helps :)

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