Question

Решите неравенство: x^2-0,5x-5<0

Answer 1

x2 - 0.5x - 5 <0
D = b2 - 4ac
D = 0.25 + 20 = 20.25 = (√20.25)

x1,2 = -b ± √D
x1 = 0.5 + √20.25/2
x2 = 0.5 - √20.25/2
(x - 0.5 + √20.25/2)(x+ 0.5 - √20.25/2)<0