Question

4) 3x2 + 8x - 3 = 0;​

Answer 1

Ответ:

x=3/8

Объяснение:

6-8x-3 = 0

3-8x =0

-8x= -3

Answer 2

$3 {x}^{2} + 8x - 3 = 0 \\ d = {8}^{2} - 4 \times 3 \times ( - 3) = 64 + 36 = 100 = {10}^{2} \\ x1 = \frac{ - 8 - \sqrt{ {10}^{2} } }{2 \times 3} = \frac{ - 18}{6} = - 3 \\ x2 = \frac{ - 8 + \sqrt{ {10}^{2} } }{2 \times 3} = \frac{2}{6} = \frac{1}{3}$

d это дискриминант

напишу ниже формулы.

$d = {b}^{2} - 4ac \\ x1 = \frac{ - b - \sqrt{d} }{2a} \\ x2 = \frac{ - b + \sqrt{d} }{2a}$