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a)
8²+15²=x²
64=225=x²
289=x²
17=x
c)
x=14-9
x=5
z²=5²+7²
z²=25+49
z²=74
z= √74
zad 10/131
a)
17-5=12
x²=12²+6²
x²=144+36
x²=180
x=√180
x=√9*20
x=3√20
x=3√4*5
x= 3*2√5
x= 6√5
Ob= 6+5+17+6√5=28+6√5
b)
8²=x²+5²
64=x²+25
64-25=x²
39=x²
√39=x
13²=y²+5²
169=y²+25
169-25=y²
144=y²
12=y
5+12+√39=17+√39
Ob=8+5+13+17+√39
Ob=43+√39
Tylko tyle mam :)