How do you multiply # (2x+1)(x+3)#? Algebra Polynomials and Factoring Multiplication of Polynomials by Binomials 1 Answer Don't Memorise Feb 26, 2016 #= 2x^2 +7x +3# Explanation: #(2x+1)(x+3)# #= color(blue)(2x xx (x ) + 2x xx (3)) + color(green)(1 xx (x) + 1 xx (3)# #= 2x^2 +6x + 1x +3# #= 2x^2 +7x +3# Answer link Related questions What is FOIL? How do you use the distributive property when you multiply polynomials? How do you multiply #(x-2)(x+3)#? How do you simplify #(-4xy)(2x^4 yz^3 -y^4 z^9)#? How do you multiply #(3m+1)(m-4)(m+5)#? How do you find the volume of a prism if the width is x, height is #2x-1# and the length if #3x+4#? How do you multiply #(a^2+2)(3a^2-4)#? How do you simplify #(x – 8)(x + 5)#? How do you simplify #(p-1)^2#? How do you simplify #(3x+2y)^2#? See all questions in Multiplication of Polynomials by Binomials Impact of this question 1722 views around the world You can reuse this answer Creative Commons License