[tex]\displaystyle\bf\\49x^2=121\bigg | :49 \implies x^2=\frac{121}{49} \implies x =\pm \sqrt{\frac{121}{49}}=\pm \frac{11}{7},~deci~:~\boxed{\bf x=\pm \frac{11}{7}}~.[/tex]
Răspuns:
x = {- 11/7 ; 11/7}
Explicație pas cu pas:
Salutare !
49x² = 121
x² = 121/49
x1 = - 11/7
x2 = 11/7
<<darius>>
