Question

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

Answer 1

ATQ.

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

Taking two common

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

2(2x+2z)

4x+4z

Ans

Answer 2

Answer:

Step-by-step explanation:

x²+4y²+z²+4xy+4yz+2xz+x²+4y²+z²-4xy-4yz+2xz

=2(x²+4y²+z²+2xz)