(2x-y)(3x+2y)+6y(x+y) Упростите упражнение

Question

(2x-y)(3x+2y)+6y(x+y) Упростите упражнение

Answer 1

(2x-y)(3x+2y)+6y(x+y)=6x^2 +4xy-3xy-2y^2 +6xy+6y^2 =6x^2 +7xy +4y^2