Решите уравнение:
1) $y^2 - 6y = 0$;
2) $x^2 + x = 0$;
3) $4m^2 - 20m = 0$;
4) $13x^2 + x = 0$;
5) $9x^2 - 6x = 0$;
6) $12x - 0,3x^2 = 0$.
$y^2 - 6y = 0$
y(y − 6) = 0
$y_1 = 0 : (y - 6)$
$y_1 = 0$;
$y_2 - 6 = 0 : y$
$y_2 - 6 = 0$
$y_2 = 6$.
$x^2 + x = 0$
x(x + 1) = 0
$x_1 = 0 : (x + 1)$
$x_1 = 0$;
$x_2 + 1 = 0 : x$
$x_2 + 1 = 0$
$x_2 = -1$.
$4m^2 - 20m = 0$
4m(m − 5) = 0
$4m_1 = 0 : (m - 5)$
$4m_1 = 0$
$m_1 = 0$;
$m_2 - 5 = 0 : 4m$
$m_2 - 5 = 0$
$m_2 = 5$.
$13x^2 + x = 0$
x(13x + 1) = 0
$x_1 = 0 : (13x + 1)$
$x_1 = 0$;
$13x_2 + 1 = 0 : x$
$13x_2 + 1 = 0$
$13x_2 = -1$
$x_2 = -\frac{1}{13}$.
$9x^2 - 6x = 0$
3x(3x − 2) = 0
$3x_1 = 0 : (3x - 2)$
$x_1 = 0 : 3$
$x_1 = 0$;
$3x_2 - 2 = 0$
$3x_2 = 2$
$x_2 = \frac{2}{3}$
$12x - 0,3x^2 = 0$
0,3x(40 − x) = 0
$0,3x_1 = 0 : (40 - x)$
$x_1 = 0 : 0,3$
$x_1 = 0$;
$40 - x_2 = 0 : 0,3x$
$-x_2 = -40$
$x_2 = 40$.
Пожауйста, оцените решение
