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√10² =10
(4+3√2)²= 16+24√2 + 18 = 34 +24√2
(6+2√2)²= 36 +24√2 + 8= 44+24√2
10 + 34 +24√2 = 44+24√2
a więc trójkąt jest prostokątny
2.
a) (1+√3)²= 1 +2√3 +3= 4 + 2√3
b) (2-3√2)²= 4 - 12√2 + 18 = 22-12√2
c) ( 3 - 2√2) (3 + 2√2) = 9 -8 = 1