$3x^2 - 4x = 0$
x(3x − 4) = 0
x = 0 или 3x − 4 = 0
3x = 4
$x = \frac{4}{3} = 1\frac{1}{3}$
Ответ:
$x_1 = 0$;
$x_2 = 1\frac{1}{3}$.

$-5x^2 + 6x = 0$
x(−5x + 6) = 0
x = 0 или −5x + 6 = 0
−5x = −6
$x = \frac{6}{5} = 1,2$
Ответ:
$x_1 = 0$;
$x_2 = 1,2$.

$10x^2 + 7x = 0$
x(10x + 7) = 0
x = 0 или 10x + 7 = 0
10x = −7
x = −0,7
Ответ:
$x_1 = 0$;
$x_2 = -0,7$.

$4a^2 - 3a = 0$
a(4a − 3) = 0
a = 0 или 4a − 3 = 0
4a = 3
a = 0,75
Ответ:
$a_1 = 0$;
$a_2 = 0,75$.

$6z^2 - z = 0$
z(6z − 1) = 0
z = 0 или 6z − 1 = 0
6z = 1
$z = \frac{1}{6}$
Ответ:
$z_1 = 0$;
$z_2 = \frac{1}{6}$.

$2y + y^2 = 0$
y(2 + y) = 0
y = 0 или 2 + y = 0
y = −2
Ответ:
$y_1 = 0$;
$y_2 = -2$.