Odpowiedzi

2009-11-19T23:00:38+01:00
4x-9x(x+1) < 4-(3x+1)²
4x-9x²-9x < 4-(9x²+6x+1)
4x-9x²-9x < 4-9x²-6x-1
4x-9x²-9x-4+9x²+6x+1 < 0
x-3 < 0
x < 3

x∈(-∞,3)
2009-11-19T23:00:59+01:00
4x-9x(x+1)<4-(3x+1)²
4x-9x²-9x-4+9x²+6x+1<0
x-3<0
x<3

x∈(-∞,3)

2009-11-19T23:02:05+01:00
4x-9x(x+1)<4-(3x+1)²
4x-9x²-9x<4-9x²-6x-1
-5x<3-6x
-5x+6x<3
x<3

(-∞;+3)