Problem 3.1: Solve for x: 3x² - 14x + 8 = 0 [Solution]

Problem 3.2: Solve for x: 4x² - 1 = 0 [Solution]

Problem 3.3: Solve for x: 2x² + 5x [Solution]

Problem 3.4: Solve for x: 4x² + 28x = - 49 [Solution]

Problem 3.5: Solve for x: 2x² + 5x + 4 [Solution]

Problem 3.6: How many solutions do the following equations have?
a) 3x² + 7x + 9
b) -2x² + 3x + 4
c) 9x² - 6x + 1
d) 2x² + 4x - 1
[Solution]