Answer:
- 11x² + 4x + 14
Step-by-step explanation:
Given
(9 - 3x²) + (- 8x² + 4x + 5) ← distribute both parenthesis by 1
= 9 - 3x² - 8x² + 4x + 5 ← collect like terms
= - 11x² + 4x + 14 ← sum of the polynomials
Step-by-step explanation:
5: x= 15.3
6: x= 11.7
7: x= 18.6
8:x= 31.7
9: x= 47.0
10:x= 25.0
Answer:
10
Step-by-step explanation:
(-15+45)/3=10