If x² - 2x - 3 = 0; values of x correct to two significant figures are :

1. 3.0 and 1.0

2. -1.0 and 3.0

3. 3.0 or -1.0

4. 3.00 or -1.00

The value (values) of x satisfying the equation x² - 6x - 16 = 0 is/are :

1. 8 or -2

2. -8 or 2

3. 8 and -2

4. -8 or 2

Solve the following equation for x and give your answer correct to one decimal place :

5x² + 10x - 3 = 0

Solve the following equation for x and give your answer correct to two decimal places :

2x² - 10x + 5 = 0