Simplify the following expression.

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.

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*