Question

1/3а(в квадрате) - 4/27 =О

Answer 1

$frac{1}{3} a^{2} = frac{4}{27} \ \ a^{2} = frac{4}{27} : frac{1}{3} \ \ a^{2} = frac{4}{27} cdot 3 \ \a^{2} = frac{4}{9}$

$a = frac{2}{3}$      или    $a = - frac{2}{3}$