Respuesta :

The answer is D. "8x⁴+x³-4x²+1."

First, you can start off by breaking down the expression based on the exponents.

1. 7x⁴+x⁴=8x⁴
2. 3x³-2x³=x³
3. -5x²+x²=-4x²
4. -x+x+1=1

The expression then simplifies to 8x⁴+x³-4x²+1.
Q&A Education