Example

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

Question

$$(x-3y-4z)^{2}$$

Expand

$x^{2}-6xy-8xz+9y^{2}+24yz+16z^{2}$

Evaluate

$\left(x-3y-4z\right)^{2}$

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