Question

a) 9x2 - 12x + 4; 6
б) 0,5x2 - 2x + 4;​

Answer 1

Ответ:

$1)9 {x}^{2} - 12x + 4 = 0 \\ d = 144 - 4 \times 4 \times 9 = 144 - 144 = 0 \\ x = \frac{12}{18} = \frac{2}{3}$

$2)0.5 {x}^{2} - 2x + 4 = 0 \\ d = 4 - 4 \times 4 \times 0.5 = 4 - 8 = - 4$

d<0

уравнение не имеет корней