Example

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

Question

$$(x+5y+2z)^{2}$$

Expand

$x^{2}+10xy+4xz+25y^{2}+20yz+4z^{2}$

Evaluate

$\left(x+5y+2z\right)^{2}$

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