Ответы и объяснения

2013-05-14T23:57:20+04:00

x^2 = 2x

x^2 - 2x = 0

x(x - 2) = 0

x = 0   i  x - 2 = 0

              x = 2

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0^2 = 2*0

   0 = 0

 

2^2 = 2*2

    4 = 4