(x - 3)(x + 5) = 0 gives x equal to :

1. 3

2. 3 or 5

3. 3 or -5

4. 3 and -5

If 4 is a root of the equation x² + kx - 4 = 0; the value of k is :

1. 3

2. -3

3. 2

4. -2

The equation 2x² - 3x + k = 0 is satisfied by x = 2; the value of k is :

1. -2

2. 2

3. 4

4. 3

If x² - 7x = 0; the value of x is :

1. 0 and 7

2. 7

3. 0

4. 0 or 7