personyperson123456 personyperson123456 10-03-2021 Mathematics contestada What is the sum of the polynomials? (3x2 - 4x + 7) + (4x2 - 5x - 12) a 7x^2 - 9x - 5 b 7x^2 + 9x - 5 c 7x^4 - 9x - 5 d 7x^4 + 9x - 5
