Answer:
-2.6x^2 - 2
Step-by-step explanation:
I must assume that by " x²_1 " you actually meant " x² - 1."
If that's the case, then our focus becomes simplifying the given expression:
- 2.1x² + 3 – 0.5x² - 1 => -2.6x^2 - 2 (answer)
