हल करना The value of 2 ^ 2 - 1 ^ 2 is | 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

$$2 ^ { 2 } - 1 ^ { 2 }$$