y²=15²+8²
y²=225+64
y²=289 /√
y=√289=17
m=17-12=5
x²+3²=5²
x²+9=25 /-9
x²=16 /√
x=√16=4
odp.: x=4
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y²=15²+8²
y²=225+64
y²=289 /√
y=√289=17
m=17-12=5
x²+3²=5²
x²+9=25 /-9
x²=16 /√
x=√16=4
odp.: x=4