Question

Решите уравнение: 7х (во второй степени) +8х+1=0

Answer 1

7x^2+8x+1=0
D=8^2-4*7*1=64-28=36
x1=(-8+6)/14=-2/14=-1/7
x2=(-8-6)/14=-14/14=-1
(7x+1)(x+1)=0

Answer 2

$7 x^{2} +8x+1=0 \\ D=64-28=36 \\ \sqrt{D} =6 \\ x_{1} = \frac{-8+6}{14} = \frac{-2}{14} =- \frac{1}{7} \\ x_{2} = \frac{-8-6}{14} = \frac{-14}{14} =-1$