Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$(x+2y+4z)^{2}$$

Expand

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

Evaluate

$\left(x+2y+4z\right)^{2}$

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