Question

Rozwiąz nierówności:
a)
b)
c)
d)

Answer 1

A)
a = 1
b = - 14
c = 49
Δ = b² - 4ac
Δ = (-14) - 4*1*49 = 196 - 196 = 0

x0 =

b)
a = -1
b = 1
c = -2
Δ = 1² - 4 * (-1) * (-2) = 1 - 8 = -7

c)
5x² - 5x > 0
5x (x - 1 ) > 0
5x > 0
x > 0
d)
x² - 3x ≥ 0
x(x-3) ≥ 0
x ≥ 0