Ronnelvaldezvinogo Ronnelvaldezvinogo Math Answered 12. Which of the following given has a sum of 3x2+ 10x + 10a (5x2 +21x + 4) + (-2x2 - 11x + 6)c (-5x2 + 2x + 4) + (-2x2-11b. (5x+21x+4) (-2x2 - 11x+6)d (5x2+2x+4)/(-23folgtis1641205110Y?