Resolver a + 2ab - b ^ 2; a = 1, b = - 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

$$a+2ab-b^{2}; a=1,b=-2$$