Question

x+y cube = x cube + y cube + 3xy(x+y)

Answer 1

*Answer*-

Step-by-step explanation:

^2= square

^3=cube

(xy)^=whole

xy^=only of y

(x+y)^2=x^2+y^2+2xy

(x+y)^3=(x+y)^2*(x+y)

=>x^2+y^2+2xy*(x+y)

=>x^2(x+y)+y^2(x+y)+2xy(x+y)

=>x^3+yx^2+xy^2+y^3+2yx^2+2xy^2