Question

Simplify:(x+y+z)2 + (x+y-Z )2​

Answer 1

Answer:

×^2+y^2+z^2-4×y-2yz+4×z

Answer 2

Answer:

(x+y+z)2 + (x+y-z) 2

Step-by-step explanation:

[x2+y2+z2+2(x)(y) +2(y)(z) +2(x)(z) ] + [x2+y2+z2 + 2(x)(y)+2(y)(-z) + 2(x)(-z)

= x2+y2+z2+ 2xy + 2yz + 2xz

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

= x2 + y2 + z2 + 4xy