Question

(x + y + z)^2 + (x + y - z)^2​

Answer 1

Answer:

Step-by-step explanation:

Here you go mate

Step 1

(x + y + z)^2 + (x + y - z)^2​  Equation

Step 2

(x+y+z)^2+(x+y-z)^2  Simplify

(x2+x2)+(2xy+2xy)+(2xz+−2xz)+(y2+y2)+(2yz+−2yz)+(z2+z2)

Step 3

(x2+x2)+(2xy+2xy)+(2xz+−2xz)+(y2+y2)+(2yz+−2yz)+(z2+z2)  Add them together

answer

2x^2+4xy+2y^2+2z^2