briana202 briana202 26-10-2022 Mathematics contestada Simplify the following expression. 2x+3x³-5x² + x² +7x+1+7x -3x³-4 A. 9x5 - 4x² +7x+5 B. 9x - 4x +7x-3 C. 5x +5x +7x-3 D. 9x5 +6x² +7x+3