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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