• Algebraické vzorce - všechny tři
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  • dvojčlen (2x + y)2
    4x<sup>2 </sup>+ 4xy + y<sup>2</sup>
  • dvojčlen (x - 3y)2
    x<sup>2 </sup>- 6xy + 9y<sup>2</sup>
  • Uprav (x - y)(x + y)
    x<sup>2 </sup>- y<sup>2</sup>
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