Example

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

Question

$$(xy-1)^{2}$$

Expand

$1+\left(xy\right)^{2}-2xy$

Evaluate

$\left(xy-1\right)^{2}$

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