January 2019 1 18 Report
Rozwiąż równania
1. (x-1)^{2} +2(x-3)^{2} = 18-10x
2. (2x+5)^{2} -(2x-5)^{2} = 3 x^{2} +41x-4
3. 6-(1-x)^{2}=(2x-3)^2 - (3x+2)^2


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