" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
16x+5 /:16
x+0,3125 < 0
b)3x+3 < 0
3x + 3 /:3
x < 0
No chyba tak jbc. to poprawiać mnie xP
4x² > -5 /:4
x² > -5/4
x > -√5/4
b)-x²+2x+3<0
Δ = b² - 4ac
Δ = 4 - 4 * (-1)*3
Δ = 4 + 12
Δ = 16
√Δ = 4
x1 = -b - √Δ /2a = -2 - 4 /-2 = 3
x2 = -b + √Δ /2a = -2 + 4 /-2 = -1
Δ=80
√Δ=4√5
x₁=-4√5/8
x₂=4√5/8
x∈(-∞,-4√5/8) <suma> (4√5,∞)
-x²+2x+3<0
Δ=4+12=16
√16=4
x₁=-2-4/-2=3
x₂=-2+4/-2=-1
x∈(-1,3)