Question

Expand each of the following using appropriate udentityies (x+2y+4z) ²

Answer 1

$x {}^{2} + 4y {}^{2} + 16z {}^{2} + 8xy + 16yz + 8zx$

Answer 2

Hi friend,

Here is your answer,

      (x+2y+4z)²
=> x² + 4y² + 16z² + 2*x*2y + 2*2y*4z+ 2*4z*x
=>  x² + 4y² + 16z²+ 4xy + 16yz + 8zx


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