Rozwiaz rownanie:
Rozwiaz nierownosc:
9x³-9x²+4x-4=0
9x²(x-1)-4(x-1)=0
(x-1)(9x²-4)=0
(x-1)(3x+2)(3x-2)=0
x-1=0 ∨ 3x+2=0 ∨ 3x-2=0
x 1=1 3x=-2 3x=2
x 2=-2/3 x 3=2/3
========================================================================
2x³-5x²-2x+5>0
x²(2x-5)-(2x-5)>0
(2x-5)(x²-1)>0
(2x-5)(x+1)(x-1)>0
2x-5=0 ∨ x+1=0 ∨ x-1=0
x=5/2 ∨ x=-1 ∨ x=1
odp: x∈(-1;1)U(5/2;∞)
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9x³-9x²+4x-4=0
9x²(x-1)-4(x-1)=0
(x-1)(9x²-4)=0
(x-1)(3x+2)(3x-2)=0
x-1=0 ∨ 3x+2=0 ∨ 3x-2=0
x 1=1 3x=-2 3x=2
x 2=-2/3 x 3=2/3
========================================================================
2x³-5x²-2x+5>0
x²(2x-5)-(2x-5)>0
(2x-5)(x²-1)>0
(2x-5)(x+1)(x-1)>0
2x-5=0 ∨ x+1=0 ∨ x-1=0
x=5/2 ∨ x=-1 ∨ x=1
odp: x∈(-1;1)U(5/2;∞)