Problem 4.1: Find the y-intercept of y = 2x² + 4x - 6. [Solution]

Problem 4.2: Find the x-intercept(s) of y = 6x² - 12x - 18, if they exist. [Solution]

Problem 4.3: Complete the square: y = x² - 8x + 3 [Solution]

Problem 4.4: Complete the square: y = 3x² + 18x + 20 [Solution]

Problem 4.5: Complete the square: y = - 5x² + 10x - 10 [Solution]

Problem 4.6: Complete the square and graph: y = x² + 4x + 5 [Solution]