Question

(x – 2y – 3z)2

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Answer 1

Answer:

Step-by-step explanation:

( x + 2y + 3z )^2 = ( x )^2 + ( 2y )^2 + ( 3z )^2 + 2 ( x )( 2y ) + 2 ( 2y ) ( 3z ) + 2 ( x )(3z)

= x^2 + y^2 + z^2 + 4xy + 12yz + 6xz

using identity

( a + b + c )^2 = a^2 + b^2 + c^2 + 2ab + 2bc + 2ac

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Answer 2

Answer: This will use the identity -

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

(x - 2y - 3z)² -

= x² + 4y² + 9z² - 4xy + 12yz - 6xz

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