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x^2+3^4=15^2

Aflati-l pe X.
^=ridicare la putere


Răspuns :

x^2+3^4=15^2
x^2+81=225
x^2=225-81
x^2=144

x^2=12^2

proba
12^2=144
11^2+3^4=15^2
144+81=225
x²+3⁴=15²
x²+81=225
x²=225-81
x²=144
x=12