Question

25х^2-1=0 срооооочно

Answer 1

$25x^2-1=0\25x^2=1\x^2=1/25\x_1=1/5, x_2=-1/5$

Answer 2

$25x^2-1=0$
$x^2=frac{1}{25}=(frac{1}{5})^2$
$x_1=sqrt{frac{1}{25}}=frac{1}{5}=0.2$
$x_2=-sqrt{frac{1}{25}}=-frac{1}{5}=-0.2$
отвте: -0.2; 0.2

Answer 3

спасибоо:**