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x * (x - 2) = x²
x² - 2x = x²
-2x = 0
x = 0
Te liczby to -2 i 0
x + 2 - druga liczba
x (x + 2) = (x + 2)²
x² + 2 x = x² + 4 x + 4
- 2 x = 4
x = - 2
x + 2 = 0
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