Question

Expand : (x + y + z)²​

Answer 1

Answer:

$(x + y + z) ^{2} = x ^{2} + {y }^{2} + {z}^{2} + 2xy - 2yz - 2xz$

Step-by-step explanation:

Hope it will help you

Answer 2

Answer:

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

Step-by-step explanation:

(x + y + z ) ( x + y + z )

= (zx² + xy + xz ) +( xy + y² + yz ) + ( xz + yz + z²)

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

= x² + y² + z² + 2xy + 2yz + 2xz