Short Answer 
The expression is simplified by first combining like terms, resulting in 5x¬≤ for the x¬≤ terms, 12x for the x terms, and -7 for the constant terms. Finally, presenting the result yields the simplified expression: 5x¬≤ + 12x Р7.
Step 1: Identify and Combine Like Terms
To solve the expression, first, identify the like terms. Like terms are those that have the same variable raised to the same power. In the expression -2x², 7x², and 4x, we focus on grouping them together:
- -2x² + 7x² = 5x²
- 8x + 4x = 12x
- -9 + 2 = -7
Step 2: Simplify the Expression
Once you have identified and combined the like terms, now you’ll simplify the entire expression. This means adding all the results from the previous step together:
- 5x² (from the x² terms)
- + 12x (from the x terms)
- – 7 (from the constant terms)
Step 3: Present the Final Result
After combining and simplifying, you now present the final result clearly. As per the calculations performed, the final simplification leads to:
- 5x¬≤ + 12x Р7
This indicates that the answer is A, showcasing the final simplified form of the expression! Hope this helps!