Question

49X² egal cu 121
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Answer 1

$\displaystyle\bf\\49x^2=121\bigg | :49 \implies x^2=\frac{121}{49} \implies x =\pm \sqrt{\frac{121}{49}}=\pm \frac{11}{7},~deci~:~\boxed{\bf x=\pm \frac{11}{7}}~.$

Answer 2

Răspuns:

x = {- 11/7 ; 11/7}

Explicație pas cu pas:

Salutare !

49x² = 121

x² = 121/49

x1 = - 11/7

x2 = 11/7

x = {- 11/7 ; 11/7}

<<darius>>