Question

неравенство
8х²-2х-1<0

Answer 1

(-бесконечности до -0,25) (-0,25 до 0,5)

Answer 2

8x^2-2x-1<0
8x^2-2x-1=0
D=b^2-4ac
D=4-4*(8*(-1))=4+32=36
x1=2+6/16=1/2
x2=2-6/16=-1/4