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x² - x = 0
x = 0
2x² = -2 / : 2
x² = -1 / √
x = √-1
x = -1 <--- to równanie które spelnia liczba -1
x - 1 = 0
x = 0 + 1
x = 1
x² + 9 = 10
x² = 10 - 9
x² = 1 / √
x = √1
x= 1
Liczę na naj :)