Rozwiąż : a)12-2(x-1)² = 4(x+2)-(x+3)(2x-5)
b)
5(x+1) 2(x-1)
______ - 1> _______
6 3
c)
3(x+4)² - 2(2x-1)² ≤ 14x - 5x²
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