हल करना 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

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