Completing the square

• By completing the square , find the turning point for the graph with an equation , y = x² + 8x + 12 ?

  ( x + 4 ) ² - 4
• Write x² - 8x -4 in the form (x - a)² - b ?


  ( x - 4 )² - 20
• Complete the square of the equation below (You can convert any fractions into mixed numbers if necessary)

  ( x - 3 / 2 )² + 3 and 3 / 4

  
• Complete the square of the equation below (You can convert any fractions into mixed numbers if necessary. Do NOT divide the equation by 2) 


  2 ( x - 5 / 2 )² - 4 and 1 / 2