Final answer:
The equation x^² + x + x + ¹ can be simplified to x^² + 2x + ¹.
Step-by-step explanation:
This is an equation in one variable, so we can solve for the unknown value by simplifying it:
x^² + x + x + ¹
We can combine like terms:
x^² + 2x + ¹
Therefore, the simplified equation is x^² + 2x + ¹.