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a²+18=49
a²=31
a=√31
P=a*b
P=√31*3√2
P=3√62
18+x²=49
x²=31
x=√31
P=3√2 * √31 = 3√62
b²=49-18
b²=31/√
b=√31
P=√31×3√2
P=3√62cm²
Myślę,że dobrze.