Answer:
Explanation:
Discussion
The form of this root is a "mirror image" of the root that is given. They come in pairs.
So the exact value of the other root is
x = - 2 + √6
You should be very careful looking at this root. The only difference is the plus sign where the minus sign used to be.
The given root has to be of the form a rational number ± an irrational number.
Later on, when you get into higher math classes, you will find there is another kind of number that this same rule applies to.