How can x^2=x^2+2x+9 be set up as a system of equations

Step-by-step explanation:

1. As you can see, is equal to the other quadratic equation .

2. Then, this would the same as write the quadratic equations as following:

3. And then set them equal to each other, as you can see below:

Substituting, you obtain:

3. Keeping the above on mind, you can set up the given equations as a system of equations as folllowing:

20

step-by-step explanation: