Question

помогите пожалуйста нужно очень​

Answer 1

$( \frac{1}{m} + 1) \times ( \frac{1}{m} - 1) = ( {( \frac{1}{m} }^{2} ) - {1}^{2} ) = \frac{1}{ {m}^{2} } - 1 = \frac{1 - {m}^{2} }{ {m}^{2} } = \frac{(1 - m)(1 + m)}{ {m}^{2} }$

Answer 2

$\displaystyle\bf\\\Big(\frac{1}{m} +1\Big)\cdot\Big(\frac{1}{m} -1\Big)=\Big(\frac{1}{m} \Big)^{2} -1^{2} =\frac{1}{m^{2} } -1=\frac{1-m^{2} }{m^{2} }$