How do you combine (6x² + 5xy - 2y²) - (-xy - 2x² - 4y²)? Algebra Polynomials and Factoring Addition and Subtraction of Polynomials 1 Answer Don't Memorise Jul 24, 2015 #=color(blue)(8x^² +6xy +2y^²# Explanation: #6x^² + 5xy - 2y^² +xy +2x^² + 4y^²# Grouping like terms : #=(6x^² +2x^²) +( 5xy +xy) + (4y^²- 2y^² )# #=8x^² +6xy +2y^²# 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 1625 views around the world You can reuse this answer Creative Commons License