Answer:
- x² + 3x - 9
Step-by-step explanation:
standard form of a polynomial of degree 2 is
ax² + bx + c ( a ≠ 0 )
Given
- 9 + 3x - x²
= - x² + 3x - 9 ← in standard form
ANSWER:}---> -x²+3x-9
