Example

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

Question

$$(ax-by)(ax+by)$$

Evaluate

$\left(ax\right)^{2}-\left(by\right)^{2}$

Expand

$\left(ax\right)^{2}-\left(by\right)^{2}$

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