Question

9x^2-8x-1=0 решите уравнение через D

Answer 1

D=8^2-4*9*-1=64+36=100
x1=8+√100/2*9=8+10/18=18/18=1
x2=8-10/18=-2/18=-1/9

Answer 2

9x² - 8x - 1 = 0

Д = (-8)² - 4 * 9 * (-1) = 64 + 36 = 100

х1 = 8 + 10 /18 = 1

х2 = 8 - 10 / 18 = -2 / 18 = -1/9