cassidylynnadkozxrs5 cassidylynnadkozxrs5 01-01-2021 Mathematics contestada Simplify: (5x2 - 9x + 3) + (4x2 + 4x - 12) (1) 9x2 + 5x - 9 2) 9x2 - 5x + 15 3) 9x² - 5x-9 4) 9x2 - 13x - 9