1.

. If m – 1⁄m = 1 then m^2 + 1 / m^2 will be​

Answer»

=> m² + 1/m² = 3

Step-by-step EXPLANATION:

= > m - \frac{1}{m} = 1 \\ = > \bf \color{red}{squaring \: both \: sides} \\ = > (m - \frac{1}{m} {)}^{2} = {1}^{2} \\ = > \bf \color{green}{(a - b {)}^{2} = {a}^{2} + {b}^{2} - 2ab} \\ = > {m}^{2} + \frac{1}{ {m}^{2} } - 2 \times m \times \frac{1}{m} = 1 \\ = > {m}^{2} + \frac{1}{ {m}^{2} } - 2 = 1 \\ = > {m}^{2} + \frac{1}{ {m}^{2} } = 1 + 2 \\ = > \boxed{ {m}^{2} + \frac{1}{m^2} = 3}


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