Odpowiedź:
a) 2x2 + 5x + 3 = 0
4+ 5x + 3 = 0
7 + 5x = 0
5x = -7
x = [tex]- \frac{7}{5}[/tex]
b) - [tex]\frac{1}{2}[/tex] x 2 + 3x + 8 = 0
-1 + 3x + 8 = 0
7 + 3x = 0
3x = -7
x = [tex]- \frac{7}{3}[/tex]
c) 5x2 - x + 1 = 0
10 - x + 1 = 0
11 - x = 0
-x = -11
x = 11
Szczegółowe wyjaśnienie:
