+143 
a.
| 6; ( x - 3) 2 | c.
| 9; ( x - 3)
|
b.
| 12; ( x - 9) 2 | d.
| 36; ( x - 6) 2 |
+23254 x² - 12x + c
To find the value of c:
-- since the coefficient of the squared term is 1,
-- divide the coefficient of the linear term by 2 ( -12 ÷ 2 = 6 )
-- square this answer ( 6² = 36 )
So, the value of c is 36
And, x² - 12x + 36, when factored, is: (x - 6)²
