elouismonroe elouismonroe 25-10-2022 Mathematics contestada Choose the simplified form of the expression. 5x^4 + 6x^2 - 2x + x^3 A.. None of these B. -2x^4 + 7x^2 + 6x C. The expression is simplified. D. 5x^4 + 7x^2 - 2x E. x^4 + 7x^2 +6x