What equation results from completing the square and then factoring? x^2+2x=9 a. (x+2)^2=8
b. (x+1)^2=8
c.(x+1)^2=10
d.(x+2)^2=10

c.(x+1)^2=10

Step-by-step explanation:

Completing the square:

We use the following relation:

In this question:

We have to find a.

Thus, we have to add 1 on the right side of the equality.

We end up with:

So the correct answer is:

c.(x+1)^2=10

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step-by-step explanation: