February 2019 0 56 Report
Sprawdz czy podana liczba x spelnia rownanie.

a) x2 + 3 x= 2x+6 , x=2
b) x2 - 4x = 6 - x , x = -1
c) 2x - 13 = x2 + 5 , x= -3
d) (5 - x) (2 + 1/2x) = 9 (3 - x) , x= 2

dzieki
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