Asked by oh em gee wow

4. (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
Bot
9x^2 - x - 3
oh em gee wow
That's not one of the answers

Bot
I apologize. I made a mistake in my calculation. The correct answer is:

9x^2 - 4x - 3