Question

(x+y+z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx
​

Answer 1

Answer:

x^2+y^2+z^2+2xy+2yz+2zx

Step-by-step explanation:

LHS

(x+y+z)^2

= [x(x)+x(y)+x(z)] [y(x)+y(y)+y(z)] [z(x)+z(y) +z(z)]

=[x^2+xy+xz] [yx+y^2+yz] [zx+zy+z^2]

=x^2+y^2+z^2+2xy+2yz+2zx