हल करना (1+ nabla)(1- nabla)=1 一人 | 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

$$( 1 + P ) ( 1 - P ) = 1$$