Question

13 la puterea2-×la puterea2=5 la puterea2​

Answer 1

Răspuns:

$x=12$

Explicație pas cu pas:

$13^2-x^2=5^2\\169-x^2=25|+x^2\\169=25+x^2|-25\\144=x^2\\x=\sqrt{144} \\x=12$

Succes! :)