bubsismommy bubsismommy 20-05-2023 Mathematics contestada Simplify the algebraic expression: 7x2 + 6x – 9x – 6x2 + 15. A) 13x2 + 3x + 15 B) x2 + 15x + 15 C) x4 – 3x + 15 D) x2 – 3x + 15