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a²+b²=c²
c²-b²=a²
13²-12²=a²
169-144=a²
25=a²
a=√25
a=5
b)
a²+c²=b²
√3²+√6²=b²
3+6=b²
9=b²
b=√9
b=3
Proszę :)
a²+144=169
a²=169-144
a²=25 √
a=5
b) √6²+√3²=b²
6+3=b²
9=b² √
b=3