Resolver (2a - b) ^ 2 - (a - 2b) ^ 2 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$(2a-b)^{2}-(a-2b)^{2}$$