Question

3(x² - 6x) = -24 пожалуйста

Answer 1

$3( {x}^{2} - 6x) = - 24$
$3 {x}^{2} - 18x + 24 = 0 \: \: \: \div 3$
${x}^{2} - 6x + 8 = 0$
$d = 36 - 32 = 4$
$x1 = \frac{6 + 2}{2} = 4$
$x2 = \frac{6 - 2}{2} = 2$

Answer 2

3(x^2 - 6x) = - 24
3x^2 - 18x = - 24
3x^2 - 18x + 24 = 0
Разделим обе части уравнения на 3.
x^2 - 6x + 8 = 0
D = (-6)^2 -4*8 = 36 - 32 = 4
x1,2=$\frac{ -(-6) +-\sqrt{4}}{2}$ = $\frac{6+-2}{2}$
x1= $\frac{6+2}{2} = 4$
x2= $\frac{6-2}{2} = 2$
Ответ: $x_{1}=4 , x_{2} = 2$