Answer: (x^2+1) • (x^2-10)
Step-by-step explanation:
1. Write “-9x^2” as a difference
X^2-10x^2
2. Factor out x^2
X^2 (x^2+1)
3. Factor out -10
-10(x^2+1)
4. Factor out x^2+1 to get:
(X^2+1) (x^2-10)
