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 1654 views around the world You can reuse this answer Creative Commons License