jrdelmercadooyhsbs jrdelmercadooyhsbs 20-03-2018 Mathematics contestada What is the sum of the polynomials? plzz help (9x4−13x3−x−7)+(7x3−2x+1) 9x^4−6x^3−x−8 9x^4−6x^3−3x−6 −6x^6+9x^4−3x^2−6 −6x^6+9x^4−x−8
