The solution set for the equation, 25x(x + 1) = -4, is:

1. $\Big{\dfrac{1}{5}, \dfrac{4}{5}\Big}$

2. $\Big{-\dfrac{1}{5}, \dfrac{4}{5}\Big}$

3. $\Big{-\dfrac{4}{5}, -\dfrac{1}{5}\Big}$

4. $\Big{-\dfrac{4}{5}, \dfrac{1}{5}\Big}$

The discriminant of the equation, 3x² - 2x + $\dfrac{1}{3}$ = 0 is :

1. 0

2. 1

3. 2

4. 4

The value of the discriminant of the equation, x² - ($\sqrt{2}$ + 1)x + $\sqrt{2}$ = 0 is:

1. 3 + $2\sqrt{2}$

2. 1 - $2\sqrt{2}$

3. 3 - $2\sqrt{2}$

4. 2 - $\sqrt{2}$

The value of the discriminant of the equation 2x² - 3x + 5 = 0, is:

1. 31

2. $\sqrt{-31}$

3. $\sqrt{31}$

4. -31