(5x^2 - 4x -1) - (-4x^2 - 4) (1 point)
-9x^2 - 8x - 1
9x^2 - 4x + 3
x^2 - 4x - 3
9x^2 + 4x - 3
9x^2 - x - 5
not an answer
I apologize for the mistake. Let me redo the problem:
(5x^2 - 4x -1) - (-4x^2 - 4)
First, we need to distribute the negative sign in front of the second set of parentheses:
(5x^2 - 4x -1) + (4x^2 + 4)
Now, we can combine like terms:
5x^2 + 4x^2 - 4x - 1 + 4
Simplifying further:
9x^2 - 4x + 3
Therefore, the answer is 9x^2 - 4x + 3.
To subtract the expression (5x^2 - 4x - 1) from (-4x^2 - 4), we need to distribute the negative sign throughout the second expression.
(-4x^2 - 4) becomes -4x^2 - 4(-1), which simplifies to -4x^2 + 4.
Now we can subtract the two expressions.
(5x^2 - 4x - 1) - (-4x^2 + 4) becomes 5x^2 - 4x - 1 - (-4x^2 + 4).
Simplifying further, we have 5x^2 - 4x - 1 + 4x^2 - 4.
Combining like terms, we get 9x^2 - 4x - 5.
Therefore, the correct answer is 9x^2 - 4x - 5.