What is the most logical first step in solving the equation x2 +6x+9 = 10 ?

Subtract 10!

Step-by-step explanation:

Since this is a quadratic equation, it should look like the following

To solve with completing the square (or the box method) you need to subtract 10 so the equation is set to equal 0!

Ok You're probably here from K12 so heres the

Conclusion: If a polygon undergoes a rigid transformation, then the image and pre-image have equal perimeters.

I just took the test and got this right, I'm a K12 student as well.

Hope this helps :)