Question

Complete the square for 3x2 - 12x = 9.

O A. (3x - 2)2 = 20
O B. (3x - 2)2 = 13
O C. (x + 2)2 = 7
OD. (x - 2)2 = 7

Answer 1

D

Explanation:

`3 {x}^(2) - 12x = 9`

`{x}^(2) - 4x = 3`

`( ( - 4)/(2) ) {}^(2)`

`{x}^(2) - 4x + 4 = 7`

`(x - 2) {}^(2) = 7`