Answer:
3. Fourth option
4. Fourth option
Step-by-step explanation:
3.
[tex]3x^2 +3x +5 = 0\\x = \dfrac{-3 \pm \sqrt{9 - 4(3)(5)}}{6}\\x = \dfrac{-3 \pm \sqrt{-51}}{6}\\x = \dfrac{-3 \pm i\sqrt{51}}{6}[/tex]
4.
[tex]x^2 - 4x -5 = 0\\(x -5)(x +1) = 0\\x = 5, -1[/tex]
