dillinlayne dillinlayne 18-08-2021 Mathematics contestada Simplify: (5x² – 3x + 7x) + (9x² + 2x² + 7x) O 14x2 – x2 + 14x O 14x2 + 13x O 16x4 + x3 O 16x2 + 11x O 16x2 – 11x