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x²-2x- x²+2x0
00
x∈R
b) -5x > 2x + 3
-5x-2x>3
-7x>3 :(-7)
x<-3/7
x∈(-∞;-3/7)
c) 1 - 5x (x - 1) < -5x²
1-5x²+5x+5x²<0
5x<-1 /:5
x<-1/5
x ∈(-∞; -1/5)
d) 1 - 7x ≥ 0
-7x-1 /:(-7)
x1/7
x∈(-∞; 1/7>
e) -4x + 2 < x - 8
-4x-x<-8-2
-5x<-10 /:(-5)
x<2
x∈(-∞;2)
f) 4 - 2x >3x - 1
-2x-3x>-1-4
-5x>5 /:(-5)
x<-1
x∈(-∞;-1)