To divide the expression \( 28x^2 + 7x - 77x^2 \), we first combine like terms:
- Combine the \( x^2 \) terms: \[ 28x^2 - 77x^2 = -49x^2 \]
So, the expression simplifies to: \[ -49x^2 + 7x \]
Now we will factor out the common factor in \( -49x^2 + 7x \): \[ = 7x(-7x + 1) \]
The expression can be rewritten as: \[ -49x^2 + 7x = 7x(1 - 7x) \]
It seems like there was a misunderstanding of the original question as it involves dividing by something else. Since the question doesn’t indicate what to divide by, I'll assume we just need the simplified polynomial itself.
If you intended to divide by a particular term or polynomial, please clarify that, and I can assist you further. If you meant to factor the expression or use polynomial long division, let me know!