We want to find an equation for the given solutions and the multiplicity of each solution.
The equation is:

First, assume that we have a given equation and we know that we have solutions {x₁, x₂, ..., xₙ}, each one with multiplicity {m₁, ..., mₙ}.
The equation, of a polynomial that meets these requirements, is given by:

Where A is the leading coefficient and can be any real number.
Now that we know that, here we have the solutions:
- x = 2 with multiplicity 2
- x = -1 with multiplicity 2
We don't have information about the leading coefficient, so we assume it is equal to 1.
Then the equation is:

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I think the correct answer to the question is 9
To solve this problem you must apply the proccedure shown below:
1. You have the following function:

2. You can rewrite it as following:

3. The line intersects the y-axis when
, therefore:

4. The line intersects the x-axis when
:

5. Now plot the points (0, 0.5) and (1,0) in a graph , as you can see in the figure attached.
Therefore, the answer is: The points of intersection are (0, 0.5) and (1,0).
His brother jogged more by 1 1/10 kilometers.