alyssabarrett15 alyssabarrett15 24-09-2021 Mathematics contestada What is the sum? (x^2+ 2x + 3)+(5x^2 + x) A 5x^2 – 3x + 3 B 6x^2 - 2x + 3 C 6x² -x+3 D 6x^2+ 3x + 3