January 2019 2 17 Report
Rozwiąż równanie, dam naj!
a)  x^{2} +9=0
b)  x^{2} -9=0
c)  2x^{2} -5=0
d)  2x^{2} -5x=0
e)  3x^{2} +8x=0
f)  x^{2} +6x+9=0




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