pureromancebycrystal pureromancebycrystal 10-04-2020 Mathematics contestada Adding Polynomial Expressions. (SIMPLIFY#1(ab^2+13b-9)+(6-4a+3ab^2)+(a+7b)#2(9x^3-2x^2-x)+(3x)+x^3-4)+(x^2-3x)
