Question

8х²+2х-1=0 решите уравнение

Answer 1

${8x}^{2} + 2x - 1 = 0 \\ {x}^{2} + 2x - 8 = 0 \\ x1 + x2 = - 2 \\ x1 \times x2 = - 8 \\ x1 = - \frac{4}{8} = - 0.5 \\ x2 = \frac{2}{8} = \frac{1}{4} = 0.25$

Answer 2

РЕШЕНИЕ:

8х^2+2х-1=0

8х^2+4х-2х-1=0

4х(2х+1)-(2х+1)=0

(2х+1)×(4х-1)=0

2х+1=0

4х-1=0

х=-1/2

х=1/4

Ответ: х¹=-1/2 ; х²=1/4