Автор - sashavideobloger58

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Ответ

Автор - matemaster69

а)

 frac{(a + b) times 5}{ab times 5}  =  frac{5a + 5b}{5ab}

 frac{(a + b) times ab}{ab times ab}  =  frac{ {a}^{2}b + a {b}^{2}  }{ {a}^{2} {b}^{2}  }

 frac{(a + b) times a}{ab times a}  =  frac{ {a}^{2} + ab }{ {a}^{2}b }

 frac{(a + b) times ( -  {b}^{2}) }{ab times( -  {b}^{2}) }  =  frac{ - a {b}^{2} -  {b}^{3}  }{ - a {b}^{3} }

б)

 frac{x times x}{(x - y) times x} =  frac{ {x}^{2} }{ {x}^{2} - xy }

 frac{x times (x + y)}{(x - y) times (x + y)}  =  frac{ {x}^{2} + xy }{ {x}^{2} +  {y}^{2}  }

в)

 frac{(m - 2) times (m + 2)}{(m + 2) times (m + 2)}  =  frac{ {m}^{2} + 4 }{ {(m + 2)}^{2} }

 frac{(m - 2) times 2m}{(m + 2) times 2m}  =  frac{2 {m}^{2} - 4m }{2 {m}^{2} + 4m }

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