Question

Expand each of the following using suitable identities 1) ( x+2y+4z)²​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

We know that

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

so,

(x+2y+4z)² = x² + (2y)²+ (4z)² + 2(x)2y + 2(2y)(4z)

+ 2(x)4z

= x² + 4y² + 16z² + 4xy + 16yz + 8xz

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