Resolver (a+b)(a-b+1)+(a-b)(a+b-1)-2b | 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

$$(a+b)(a-b+1)+(a-b)(a+b-1)-2b$$