To solve this problem you must:
1. Rewrite the equations:
y=x²-2x-1 (i)
y=-2 (ii)
2. Then:
(i)=(ii)
-2=x²-2x-1
3. Now, you must order the terms and and factorize, as below:
(x-1)(x-1)=0
(x-1)²=0
4. The solution is:
x=1
You can see that the graphs attached touch each other in x=1. Therefore, the solution is x=1
