2x²+6x-7x+8-3x²+1
A) 2x^+x+9
B) -2x^2-x-9
C) -x^2-x+9
D) x^2 +9
Simplifying the expression by combining like terms:
2x² - 3x² + 6x - 7x + 8 + 1
= -x² - x + 9
So the answer is option C: -x² - x + 9.
To simplify the expression 2x²+6x-7x+8-3x²+1, we need to combine like terms.
First, let's combine the x² terms: 2x² - 3x² = -x².
Next, let's combine the x terms: 6x - 7x - 3x = -4x.
Finally, let's combine the constant terms: 8 + 1 = 9.
Therefore, the simplified expression is -x² - 4x + 9.
So, the correct option is C) -x^2 - x + 9.