Question

9y^2-1=0
Дам 30 баллов

Answer 1

$9y^2-1=0\\9y^2=1\\\\ y^2=\dfrac{1}{9} \\\\ y=\pm \dfrac{1}{3}$

Answer 2

Решение:

$9{y}^{2} - 1 = 0$

$9 {y}^{2} = 1$

${y}^{2} = \frac{1}{9}$

$y = + - \frac{1}{3}$

Ответ: y= +- 1/3