Rovnice a nerovnice vyšších stupňů

9000019807

Část: 
A
Určete množinu všech řešení dané rovnice. \[\left (3x + 2\right )\left (x\sqrt{2} + 1\right )\left (x^{2} + 1\right ) = 0\]
\(\left \{-\frac{\sqrt{2}} {2} ;-\frac{2} {3}\right \}\)
\(\left \{-\frac{2} {3}; \frac{1} {\sqrt{2}}\right \}\)
\(\left \{\frac{2} {3}; \frac{1} {\sqrt{2}}\right \}\)
\(\left \{-1;-\frac{\sqrt{2}} {2} ;-\frac{2} {3}\right \}\)

9000019809

Část: 
B
Vyberte správný součinový tvar dané rovnice. \[x^{3} + 3x^{2} - x - 3 = 0\]
\(\left (x + 3\right )\left (x + 1\right )\left (x - 1\right ) = 0\)
\(\left (x - 3\right )\left (x + 1\right )\left (x - 1\right ) = 0\)
\(\left (x + 3\right )\left (x - 3\right )\left (x - 1\right ) = 0\)
\(\left (x + 3\right )\left (x - 3\right )\left (x + 1\right ) = 0\)

9000019810

Část: 
B
Vyberte správný součinový tvar dané rovnice. \[5x^{4} - 30x^{2} + 40 = 0\]
\(5\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x - 2\right )\left (x + 2\right ) = 0\)
\(\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x - 2\right )\left (x + 2\right ) = 0\)
\(5x\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x - 2\right ) = 0\)
\(5x\left (x -\sqrt{2}\right )\left (x + \sqrt{2}\right )\left (x + 2\right ) = 0\)