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1 + 9 = x
1+81= x2
x2=82=pierwiastek z 82
2. 90 60 30 pier=pierwiastek
2a apier3 a
10 5pier3 5
2a=10 / 2
a=5
3. a) b) 90 60 30
90 60 30 2a apier3 a
2a apier3 a 4pier3 6 2pier3
4 2pier3 2 y=6
c=4 z=2pier3
b=2pier3