Question

solve this
(x-2y-z) ²​

Answer 1

Answer:-

$\bf \:Formula \: used:-$

(a-b-c) ² = a² + b² + c² - 2ab + 2bc - 2ac

$\bf \: Solution$

(x-2y-z) ²

= x ² + (2y)² + z² - 2×x×2y + 2×2y×z - 2×x×z

= x² + 4y² + z² - 4xy + 4yz - 2xz