Question

(3x+y)(2x-5y)-6(x-y) Помогите плиз Упростить выражение

Answer 1

6х^2-15xy+2xy-5y^2-6x+6y=6x^2-13xy-5y^2-6x+6y.

Answer 2

(3x+y)(2x-5y)-6(x-y)=6x^2-13xy-y^2*5-6*(x-y)=6x^2-13xy-y^2*5-(6x-6y)=6x^2-13xy-5y^2-6x+6y