Odpowiedzi

2010-03-12T18:37:34+01:00
(2x-1)²+7>(1+x)²+3x²
4x²-4x+1+7>1+2x+x²+3x²
4x²-4x+8>4x²+2x+1 |-4x²
-4x+8>2x+1 |+4x
8>6x+1 |-1
7>6x |:6
7\6>x
x<7\6
2010-03-12T18:41:48+01:00
(2x-1)kwadrat+7>(1+x)kwadrat+3xkwadrat
(2x-1)²+7>(1+x)²+3x²
4x²-4x+8>1+2x+x²+3x²
4x²-4x²+7>2x+4x
-6x>-7/:(-6)
x<7/6