Question

Simplify :(x+y+z)2 + (x+y-z )2​

Answer 1

Step-by-step explanation:

here's the answer

if I have made something wrong in it

you please tell me

Answer 2

Answer:

2x²+2y²+4xy

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2ab+2bc+2ca

so by expanding the given expression;

x²+y²+z²+2xy+2yz+2zx+x²+y²-z²+2xy-2yz-2zx

2x²+2y²+4xy