हल करना (a ^ 2 - 2a + 1)/(1 - a ^ 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

$$\frac{a^{2}-2a+1}{1-a^{2}}$$