Question

(x+y+1) (x+y+1)

Answer 1

(x+y+1)^2

Answer 2

write as a polynomial

Answer 3

x^2+y^2+1+2x+2y+2xy

Answer 4

\[(a+b+c)^2=a^2+b^2+c^2+2(ab+bc+ca)\]

Answer 5

thanks