Question

4x²=0,5
clasa 7
COROANA pls

Answer 1

Răspuns:

$\boxed{x=\pm \frac{1}{2\sqrt2} }$

Explicație pas cu pas:

$4x^2=0,5=\frac{1}{2} \\ x^2=\frac{1}{2} \cdot\frac{1}{4} \\x^2=\frac{1}{8}$

$x=\pm \sqrt{\frac{1}{8} }=\pm \frac{\sqrt1}{\sqrt8} =\pm\frac{1}{2\sqrt2} \\\sqrt8=\sqrt{2^2\cdot2}=2\sqrt2$