Question

3x²+7x+2=0 кто поможет?​

Answer 1

Объяснение:

$3 {x}^{2} + 7x + 2 = 0$

$a = 3 \\ b = 7 \\ c = 2$

$d = {b}^{2} - 4ac$

$d = {7}^{2} - 4 \times 3 \times 2 = 25 = {5}^{2}$

$x_{1} = \frac{ - b + \sqrt{d} }{2a } = \frac{ - 7 + 5}{2 \times 3} = \frac{ - 2}{6} = - \frac{1}{3}$

$x_{2} = \frac{ - b - \sqrt{d} }{2a} = \frac{ - 7 - 5}{2 \times 3} = \frac{ - 12}{6} = - 2$