How much is #(-17x^6 - 6x^3 - 20x) + (-10x^4 + 9x^3 - 18)#? Algebra Polynomials and Factoring Addition and Subtraction of Polynomials 1 Answer Alan P. Aug 10, 2015 Combining terms with identical exponents of #x# gives: #color(white)("XXXX")##-17x^6-10x^4+3x^3-20x-18# Explanation: #(-17x^6-6x^3-20x)+(-10x^4+9x^3-18)# #{:(=, ,(-17x^6), , ), ( ,+, ,+,(-10x^4)), ( ,+, (-6x^3),+,(+9x^3)), ( ,+, (-20x), , ), (, +, ,+,(-18)) :}# #= -17x^6-10x^4+3x^3-20x-18# 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 1315 views around the world You can reuse this answer Creative Commons License