How do you simplify (20x^6 - 13x^5) - (-7x^6 + 7x^5 - 20x^3 - 4x^2)? Algebra Polynomials and Factoring Addition and Subtraction of Polynomials 1 Answer Tessalsifi Jun 8, 2015 =20x^6-13x^5+7x^6-7x^5+20x^3+4x^2 ( the - changes the signs of the numbers in the parenthesis ) =27x^6-20x^5+20x^3+4x^2 =(x²)*(27x^4-20x^3+20x+4) ( if you want to factor it ) Answer link Related questions How do you add two polynomials? How do you subtract two polynomials? How do you add and simplify 3x^2-4x+7 and 2x^3-4x^2-6x+5? How do you subtract 5b^2-2a^2 from 4a^2-8ab-9b^2? How do you simplify (6.9a^2-2.3b^2+2ab)+(3.1a-2.5b^2+b)? How do you simplify (-t+15t^2)-(5t^2+2t-9)? How do you subtract (-5m^2-m)-(3m^2+4m-5)? How do you add two polynomials if they don't have like terms? How do you simplify (3a+4b)-(-6a-3b)? How do you subtract (x^2-8x+7)-(6x^2+7x-3)? See all questions in Addition and Subtraction of Polynomials Impact of this question 1890 views around the world You can reuse this answer Creative Commons License