हल करना A4-2A3+(1)/(7)A2-12A+12 | 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

$$A4-2A3+ \frac{ 1 }{ 7 } A2-12A+12$$