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x2 + 5 tez do kwadratu = 9 kwadrat
x2 + 25= 81 / -25
x2=56 / pierwiastek
x= pierwiastek z 56
gotowe:)
2x = 9∫3 /:2
x = 4,5∫3 cm
5² + x² = 9²
x²=9² - 5²
x²=81 -25
x²=56
x=√56
x=2√14