Question

write the expansion of
(x+y+z)²​

Answer 1

(x^2 + y^2+ z^2+2xy+2yz+2zx) it is right formula please mark me brainliest

Answer 2

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

Derivation :-

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

=> (x² + xy + xz) + (xy + y² + yz) + (xz + yz + z²)

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

=> x² + y² + z² + 2xy + 2yz + 2xz

Derived.

Hope it helped you...