Question

-5b^2+320=0 найдите корень уравнений

Answer 1

Решение и ответ:

$\displaystyle -5{b^2}+320=0$

$\displaystyle -5{b^2}=-320$

$\displaystyle {b^2}=-320\div\left({-5}\right)$

$\displaystyle {b^2}=64$

$\displaystyle b=\pm\sqrt{64}$

$\displaystyle b=\pm8$

$\displaystyle {b_1}=8$

$\displaystyle {b_2}=-8$