25х^2-1=0 срооооочно

[latex]25x^2-1=0\\25x^2=1\\x^2=1/25\\x_1=1/5, x_2=-1/5[/latex]

[latex]25x^2-1=0[/latex] [latex]x^2=\frac{1}{25}=(\frac{1}{5})^2[/latex] [latex]x_1=\sqrt{\frac{1}{25}}=\frac{1}{5}=0.2[/latex] [latex]x_2=-\sqrt{\frac{1}{25}}=-\frac{1}{5}=-0.2[/latex] отвте: -0.2; 0.2