How do you simplify #(3a^3 - 7a^2 + a) - (6a^3 - 4a^2 - 8)#? Algebra Polynomials and Factoring Addition and Subtraction of Polynomials 1 Answer Don't Memorise Jun 11, 2015 # color(blue)(-3a^3) -color(red)(3a^2) + a+8# Explanation: #color(blue)(3a^3) - color(red)(7a^2) + a - color(blue)(6a^3) + color(red)(4a^2) + 8# Grouping like terms: # color(blue)(3a^3-6a^3) color(red)(-7a^2+ 4a^2)+ a +8# # = color(blue)(-3a^3) -color(red)(3a^2) + a+8# 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 2761 views around the world You can reuse this answer Creative Commons License