February 2019 0 9 Report
Rozwiąż równanie:
a) |x^2+x+2| - |x^2-x+2| = 8
b) |x^2-3x+7| - |x^2-3x+11| + |x^2-1| = 0
c) |x^2-1| = x^2 -1
d) |x^2-x+3| - |x^2-x+1| = 2 - |x^2-9|
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