Question

solutia naturala a ecuatiei 2x²=98 (pls repede)

Answer 1

2x^2=98|:2
x^2=49
x=7
V:2•7^2= 2•49= 98

Sper ca te-am ajutat!
Coroana?

Answer 2

Răspuns:

    $\text{S = \{7\}}$

Explicație pas cu pas:

    $\text{2x}^2=98~\big{|}:2\\\\\text{x}^2=49\\\\\text{x}=\pm\sqrt{49}\\\\\text{x}_1\text{, x}_2=\pm\text{7}\\\text{x}\in\mathbb{N}\\\\\implies \text{x}=\text{7}\\\\\text{S = \{7\}}$