schooltimehp5 schooltimehp5 07-01-2023 Mathematics contestada What is the simplified form of this expression? (-3x2 + 2x − 4) + (4x2 + 5x + 9) 7x2 + 7x + 5 x2 + 7x + 5 x2 + 7x + 13 x2 + 11x + 1