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w zad. 8 ucielo mi x2=.................= -3+√2
zad. 9
2x²-7x=-30-2x(1-x)?
2x²-7x=-30-2x+2x²
2x²-7x+2x-2x²=-30
-5x=-30
x=6 -> czyli odp. C
pozdrawiam:)