Mathematics, 25.07.2019 12:00 bakoeboo

What is the sum of the polynomials? (9x4−13x3−x−7)+(7x3−2x+1) a.) −6x^6+9x^4−3x^2−6 b.)−6x^6+9x^4−x−8 c.)9x^4−6x^3−x−8 d.)9x^4−6x^3−3x−6

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What is the sum of the polynomials? (9x4−13x3−x−7)+(7x3−2x+1) a.) −6x^6+9x^4−3x^2−6 b.)−6x^6+9x^4−x...